--- a/testing/web-platform/meta/css/CSS2/ui/outline-applies-to-005.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-applies-to-005.xht.ini
@@ -1,3 +1,4 @@
 [outline-applies-to-005.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-applies-to-006.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-applies-to-006.xht.ini
@@ -1,3 +1,4 @@
 [outline-applies-to-006.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-color-applies-to-005.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-color-applies-to-005.xht.ini
@@ -1,3 +1,4 @@
 [outline-color-applies-to-005.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-color-applies-to-006.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-color-applies-to-006.xht.ini
@@ -1,3 +1,4 @@
 [outline-color-applies-to-006.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-style-applies-to-005.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-style-applies-to-005.xht.ini
@@ -1,3 +1,4 @@
 [outline-style-applies-to-005.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-style-applies-to-006.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-style-applies-to-006.xht.ini
@@ -1,3 +1,4 @@
 [outline-style-applies-to-006.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-width-applies-to-005.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-width-applies-to-005.xht.ini
@@ -1,3 +1,4 @@
 [outline-width-applies-to-005.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/css/CSS2/ui/outline-width-applies-to-006.xht.ini
+++ b/testing/web-platform/meta/css/CSS2/ui/outline-width-applies-to-006.xht.ini
@@ -1,3 +1,4 @@
 [outline-width-applies-to-006.xht]
   expected:
     if webrender: FAIL
+  max-asserts: 2

--- a/testing/web-platform/meta/custom-elements/pseudo-class-defined.html.ini
+++ b/testing/web-platform/meta/custom-elements/pseudo-class-defined.html.ini
@@ -1,9 +1,10 @@
 [pseudo-class-defined.html]
+  max-asserts: 4
   [<div> should be :defined]
     expected: FAIL
 
   [createElement("div") should be :defined]
     expected: FAIL
 
   [createElementNS("http://www.w3.org/1999/xhtml", "div") should be :defined]
     expected: FAIL

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/custom-elements/upgrading.html.ini
@@ -0,0 +1,2 @@
+[upgrading.html]
+  max-asserts: 4

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/domparsing/insert_adjacent_html-xhtml.xhtml.ini
@@ -0,0 +1,2 @@
+[insert_adjacent_html-xhtml.xhtml]
+  max-asserts: 2

--- a/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-setMediaKeys-after-src.https.html.ini
+++ b/testing/web-platform/meta/encrypted-media/clearkey-mp4-playback-temporary-setMediaKeys-after-src.https.html.ini
@@ -1,8 +1,10 @@
 [clearkey-mp4-playback-temporary-setMediaKeys-after-src.https.html]
+  expected:
+    if debug and not webrender and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): TIMEOUT
   [org.w3.clearkey, temporary, mp4, playback, setMediaKeys after setting video.src]
     expected:
       if not debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): FAIL
       if debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): FAIL
       if debug and e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): FAIL
       if not debug and not e10s and (os == "win") and (version == "5.1.2600") and (processor == "x86") and (bits == 32): FAIL
 

--- a/testing/web-platform/meta/fetch/api/request/request-consume-empty.html.ini
+++ b/testing/web-platform/meta/fetch/api/request/request-consume-empty.html.ini
@@ -1,9 +1,10 @@
 [request-consume-empty.html]
+  max-asserts: 2
   [Consume request's body as text]
     expected: FAIL
 
   [Consume request's body as blob]
     expected: FAIL
 
   [Consume request's body as arrayBuffer]
     expected: FAIL

--- a/testing/web-platform/meta/fetch/api/response/response-consume-empty.html.ini
+++ b/testing/web-platform/meta/fetch/api/response/response-consume-empty.html.ini
@@ -1,9 +1,10 @@
 [response-consume-empty.html]
+  max-asserts: 2
   [Consume response's body as text]
     expected: FAIL
 
   [Consume response's body as blob]
     expected: FAIL
 
   [Consume response's body as arrayBuffer]
     expected: FAIL

--- a/testing/web-platform/meta/html/browsers/browsing-the-web/unloading-documents/004.html.ini
+++ b/testing/web-platform/meta/html/browsers/browsing-the-web/unloading-documents/004.html.ini
@@ -1,4 +1,5 @@
 [004.html]
+  max-asserts: 2
   [document.open in beforeunload with button]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/dom/documents/dom-tree-accessors/document.title-09.html.ini
@@ -0,0 +1,2 @@
+[document.title-09.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/dom/reflection-forms.html.ini
+++ b/testing/web-platform/meta/html/dom/reflection-forms.html.ini
@@ -1,10 +1,11 @@
 [reflection-forms.html]
   prefs: [dom.forms.inputmode:true]
+  max-asserts: 3
   [form.tabIndex: setAttribute() to object "3" followed by getAttribute()]
     expected: FAIL
 
   [form.tabIndex: setAttribute() to object "3" followed by IDL get]
     expected: FAIL
 
   [form.method: setAttribute() to "dialog" followed by IDL get]
     expected: FAIL

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/dom/reflection-tabular.html.ini
@@ -0,0 +1,2 @@
+[reflection-tabular.html]
+  max-asserts: 7

--- a/testing/web-platform/meta/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
+++ b/testing/web-platform/meta/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
@@ -1,9 +1,12 @@
 [hash-name-reference.html]
+  max-asserts: 52
+  expected:
+    if debug and not webrender and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): ERROR
   [HTML (standards) IMG usemap="#hash-name"]
     expected: FAIL
 
   [HTML (standards) OBJECT usemap="#hash-name"]
     expected: FAIL
 
   [HTML (standards) IMG usemap="#hash-id"]
     expected: FAIL

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/embedded-content/media-elements/interfaces/TextTrackCue/constructor.html.ini
@@ -0,0 +1,2 @@
+[constructor.html]
+  max-asserts: 103

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/embedded-content/media-elements/playing-the-media-resource/pause-move-to-other-document.html.ini
@@ -0,0 +1,2 @@
+[pause-move-to-other-document.html]
+  max-asserts: 103

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/embedded-content/media-elements/seeking/seek-to-currentTime.html.ini
@@ -0,0 +1,2 @@
+[seek-to-currentTime.html]
+  max-asserts: 102

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/__dir__.ini
@@ -0,0 +1,1 @@
+max-asserts: 3
\ No newline at end of file

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-button-element/button-type.html.ini
@@ -0,0 +1,2 @@
+[button-type.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-button-element/button-validationmessage.html.ini
@@ -0,0 +1,2 @@
+[button-validationmessage.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-button-element/button-validity.html.ini
@@ -0,0 +1,2 @@
+[button-validity.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-button-element/button-willvalidate.html.ini
@@ -0,0 +1,2 @@
+[button-willvalidate.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/__dir__.ini
@@ -0,0 +1,1 @@
+max-asserts: 2
\ No newline at end of file

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-action-reflection-with-base-url.html.ini
@@ -0,0 +1,2 @@
+[form-action-reflection-with-base-url.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-action-reflection.html.ini
@@ -0,0 +1,2 @@
+[form-action-reflection.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-form-element/form-autocomplete.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-autocomplete.html.ini
@@ -1,10 +1,11 @@
 [form-autocomplete.html]
   prefs: [dom.forms.autocomplete.formautofill:true]
+  max-asserts: 3
   [form autocomplete attribute missing]
     expected: FAIL
 
   [form autocomplete attribute on]
     expected: FAIL
 
   [form autocomplete attribute off]
     expected: FAIL

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-checkvalidity.html.ini
@@ -0,0 +1,2 @@
+[form-checkvalidity.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-form-element/form-elements-filter.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-elements-filter.html.ini
@@ -1,2 +1,3 @@
 [form-elements-filter.html]
   prefs: [dom.webcomponents.shadowdom.enabled:true]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-elements-matches.html.ini
@@ -0,0 +1,2 @@
+[form-elements-matches.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-form-element/form-elements-nameditem-01.html.ini
@@ -0,0 +1,2 @@
+[form-elements-nameditem-01.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/__dir__.ini
@@ -0,0 +1,2 @@
+max-asserts: 2
+

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-stepup.html.ini
@@ -0,0 +1,2 @@
+[input-stepup.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-type-button.html.ini
@@ -0,0 +1,2 @@
+[input-type-button.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-type-checkbox.html.ini
@@ -0,0 +1,2 @@
+[input-type-checkbox.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-validationmessage.html.ini
@@ -0,0 +1,2 @@
+[input-validationmessage.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-validity.html.ini
@@ -0,0 +1,2 @@
+[input-validity.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-input-element/input-value-invalidstateerr.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-value-invalidstateerr.html.ini
@@ -1,4 +1,5 @@
 [input-value-invalidstateerr.html]
+  max-asserts: 3
   [Forms]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-valueasdate-invalidstateerr.html.ini
@@ -0,0 +1,2 @@
+[input-valueasdate-invalidstateerr.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-valueasnumber-invalidstateerr.html.ini
@@ -0,0 +1,2 @@
+[input-valueasnumber-invalidstateerr.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-input-element/input-width.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-width.html.ini
@@ -1,4 +1,5 @@
 [input-width.html]
+  max-asserts: 3
   [Forms]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/input-willvalidate.html.ini
@@ -0,0 +1,2 @@
+[input-willvalidate.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/maxlength.html.ini
@@ -0,0 +1,2 @@
+[maxlength.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/minlength.html.ini
@@ -0,0 +1,2 @@
+[minlength.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-input-element/month.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/month.html.ini
@@ -1,9 +1,10 @@
 [month.html]
+  max-asserts: 3
   [The value attribute, if specified and not empty, must have a value that is a valid month string]
     expected: FAIL
 
   [The min attribute, if specified, must have a value that is a valid month string.]
     expected: FAIL
 
   [The max attribute, if specified, must have a value that is a valid month string]
     expected: FAIL

--- a/testing/web-platform/meta/html/semantics/forms/the-input-element/number.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/number.html.ini
@@ -1,7 +1,8 @@
 [number.html]
+  max-asserts: 2
   [value >= Number.MAX_VALUE]
     expected: FAIL
 
   [value = +1]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/pattern_attribute.html.ini
@@ -0,0 +1,2 @@
+[pattern_attribute.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/radio-groupname-case.html.ini
@@ -0,0 +1,2 @@
+[radio-groupname-case.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/reset.html.ini
@@ -0,0 +1,2 @@
+[reset.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-input-element/search_input.html.ini
@@ -0,0 +1,2 @@
+[search_input.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-label-element/label-attributes.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-label-element/label-attributes.html.ini
@@ -1,2 +1,3 @@
 [label-attributes.html]
   prefs: [dom.webcomponents.shadowdom.enabled:true]
+  max-asserts: 8

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-label-element/proxy-click-to-associated-element.html.ini
@@ -0,0 +1,2 @@
+[proxy-click-to-associated-element.html]
+  max-asserts: 22

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-meter-element/meter.html.ini
@@ -0,0 +1,2 @@
+[meter.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-add.html.ini
@@ -0,0 +1,2 @@
+[common-HTMLOptionsCollection-add.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-namedItem.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/common-HTMLOptionsCollection-namedItem.html.ini
@@ -1,9 +1,10 @@
 [common-HTMLOptionsCollection-namedItem.html]
+  max-asserts: 3
   [return an HTMLOptionsCollection in correct order for repeated 'id' value]
     expected: FAIL
 
   [return an HTMLOptionsCollection in correct order for repeated 'name' value]
     expected: FAIL
 
   [return an HTMLOptionsCollection in correct order for repeated mixed value]
     expected: FAIL

--- a/testing/web-platform/meta/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/common-HTMLOptionsCollection.html.ini
@@ -1,4 +1,5 @@
 [common-HTMLOptionsCollection.html]
+  max-asserts: 3
   [Changing the length adds new nodes; The number of new nodes = new length minus old length]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/select-ask-for-reset.html.ini
@@ -0,0 +1,2 @@
+[select-ask-for-reset.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/select-multiple.html.ini
@@ -0,0 +1,2 @@
+[select-multiple.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/html/semantics/forms/the-select-element/select-named-getter.html.ini
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/select-named-getter.html.ini
@@ -1,4 +1,5 @@
 [select-named-getter.html]
+  max-asserts: 3
   [Empty string name]
     expected: FAIL
 

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/select-selectedOptions.html.ini
@@ -0,0 +1,2 @@
+[select-selectedOptions.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-select-element/selected-index.html.ini
@@ -0,0 +1,2 @@
+[selected-index.html]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/forms/the-textarea-element/value-defaultValue-textContent-xhtml.xhtml.ini
@@ -0,0 +1,2 @@
+[value-defaultValue-textContent-xhtml.xhtml]
+  max-asserts: 3

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/grouping-content/the-ol-element/reversed-1b.html.ini
@@ -0,0 +1,2 @@
+[reversed-1b.html]
+  max-asserts: 2

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/html/semantics/grouping-content/the-ul-element/grouping-ul.html.ini
@@ -0,0 +1,2 @@
+[grouping-ul.html]
+  max-asserts: 3

--- a/testing/web-platform/meta/mimesniff/mime-types/parsing.any.js.ini
+++ b/testing/web-platform/meta/mimesniff/mime-types/parsing.any.js.ini
@@ -1,9 +1,10 @@
 [parsing.any.worker.html]
+  max-asserts: 2469
   [TEXT/HTML;CHARSET=GBK (Blob/File)]
     expected: FAIL
 
   [TEXT/HTML;CHARSET=GBK (Request/Response)]
     expected: FAIL
 
   [text/html;charset=gbk( (Blob/File)]
     expected: FAIL
@@ -3695,16 +3696,17 @@
   [/ (Blob/File)]
     expected: FAIL
 
   [/ (Request/Response)]
     expected: FAIL
 
 
 [parsing.any.html]
+  max-asserts: 2469
   [TEXT/HTML;CHARSET=GBK (Blob/File)]
     expected: FAIL
 
   [TEXT/HTML;CHARSET=GBK (Request/Response)]
     expected: FAIL
 
   [text/html;charset=gbk( (Blob/File)]
     expected: FAIL

--- a/testing/web-platform/meta/quirks/percentage-height-calculation.html.ini
+++ b/testing/web-platform/meta/quirks/percentage-height-calculation.html.ini
@@ -1,9 +1,10 @@
 [percentage-height-calculation.html]
+  max-asserts: 15
   [The percentage height calculation quirk, html { margin:10px } body { display:inline } #test { height:100% }<div id=test></div>]
     expected: FAIL
 
   [The percentage height calculation quirk, <html xmlns="{html}"><head><style>#test { height:100% }</style></head><body><body><div id="test"/></body></body></html>]
     expected: FAIL
 
   [The percentage height calculation quirk, <html><head xmlns="{html}"><style>#test { height:100% }</style></head><body xmlns="{html}"><div id="test"/></body></html>]
     expected: FAIL

--- a/testing/web-platform/meta/shadow-dom/leaktests/window-frames.html.ini
+++ b/testing/web-platform/meta/shadow-dom/leaktests/window-frames.html.ini
@@ -1,4 +1,5 @@
 [window-frames.html]
+  max-asserts: 4
   [window.frames should not leak frames in Shadow DOM.]
     expected: FAIL
 

--- a/testing/web-platform/meta/streams/readable-streams/tee.dedicatedworker.html.ini
+++ b/testing/web-platform/meta/streams/readable-streams/tee.dedicatedworker.html.ini
@@ -1,9 +1,9 @@
 [tee.dedicatedworker.html]
   expected:
-    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and not e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
-    if debug and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH

--- a/testing/web-platform/meta/streams/readable-streams/tee.html.ini
+++ b/testing/web-platform/meta/streams/readable-streams/tee.html.ini
@@ -1,9 +1,10 @@
 [tee.html]
   expected:
     if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
     if debug and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
     if debug and not e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
     if debug and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
     if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
     if debug and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH

--- a/testing/web-platform/meta/streams/readable-streams/tee.serviceworker.https.html.ini
+++ b/testing/web-platform/meta/streams/readable-streams/tee.serviceworker.https.html.ini
@@ -1,9 +1,9 @@
 [tee.serviceworker.https.html]
   expected:
-    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and not e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
-    if debug and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH

--- a/testing/web-platform/meta/streams/readable-streams/tee.sharedworker.html.ini
+++ b/testing/web-platform/meta/streams/readable-streams/tee.sharedworker.html.ini
@@ -1,9 +1,9 @@
 [tee.sharedworker.html]
   expected:
-    if debug and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and not e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
-    if debug and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
-    if debug and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
-    if debug and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and not e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "6.1.7601") and (processor == "x86") and (bits == 32): CRASH
+    if debug and not webrender and e10s and (os == "win") and (version == "10.0.15063") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and not webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH
+    if debug and webrender and e10s and (os == "linux") and (version == "Ubuntu 16.04") and (processor == "x86_64") and (bits == 64): CRASH

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/xhr/abort-event-abort.htm.ini
@@ -0,0 +1,2 @@
+[abort-event-abort.htm]
+  max-asserts: 2

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/xhr/send-data-unexpected-tostring.htm.ini
@@ -0,0 +1,2 @@
+[send-data-unexpected-tostring.htm]
+  max-asserts: 2