--- a/dom/ipc/tests/chrome.ini
+++ b/dom/ipc/tests/chrome.ini
@@ -1,8 +1,8 @@
 [DEFAULT]
-skip-if = buildapp == 'b2g' || os == 'android'
+skip-if = os == 'android'
 support-files =
   process_error.xul
   process_error_contentscript.js
 
 [test_process_error.xul]
-skip-if = buildapp == "mulet" || !crashreporter
+skip-if = !crashreporter

--- a/dom/ipc/tests/mochitest.ini
+++ b/dom/ipc/tests/mochitest.ini
@@ -1,23 +1,22 @@
 [DEFAULT]
 support-files =
   file_bug1086684.html
 
 [test_blob_sliced_from_child_process.html]
 # This test is only supposed to run in the main process.
-skip-if = buildapp == 'b2g' || e10s
+skip-if = e10s
 [test_blob_sliced_from_parent_process.html]
 # This test is only supposed to run in the main process.
-skip-if = buildapp == 'b2g' || buildapp == 'mulet' || e10s
+skip-if = e10s
 [test_bug1086684.html]
 # This test is only supposed to run in the main process
-skip-if = buildapp == 'b2g' || e10s || toolkit == 'android'
+skip-if = e10s || toolkit == 'android'
 [test_cpow_cookies.html]
-skip-if = buildapp == 'b2g' || buildapp == 'mulet'
 [test_child_docshell.html]
 skip-if = toolkit == 'cocoa' # disabled due to hangs, see changeset 6852e7c47edf
 [test_CrashService_crash.html]
-skip-if = !(crashreporter && !e10s && (toolkit == 'gtk2' || toolkit == 'gtk3' || toolkit == 'cocoa' || toolkit == 'windows') && (buildapp != 'b2g' || toolkit == 'gonk') && (buildapp != 'mulet')) # TC: Bug 1144079 - Re-enable Mulet mochitests and reftests taskcluster-specific disables.
+skip-if = !(crashreporter && !e10s && (toolkit == 'gtk2' || toolkit == 'gtk3' || toolkit == 'cocoa' || toolkit == 'windows'))
 [test_temporaryfile_stream.html]
 support-files =
   blob_verify.sjs
   !/dom/canvas/test/captureStream_common.js