--- a/devtools/client/locales/en-US/debugger.dtd
+++ b/devtools/client/locales/en-US/debugger.dtd
@@ -49,20 +49,16 @@
 <!-- LOCALIZATION NOTE (debuggerUI.sources.toggleBreakpoints): This is the tooltip for the
   -  button that toggles all breakpoints for all sources. -->
 <!ENTITY debuggerUI.sources.toggleBreakpoints "Enable/disable all breakpoints">
 
 <!-- LOCALIZATION NOTE (debuggerUI.sources.togglePromiseDebugger): This is the
   -  tooltip for the button that toggles the promise debugger. -->
 <!ENTITY debuggerUI.sources.togglePromiseDebugger "Toggle Promise Debugger">
 
-<!-- LOCALIZATION NOTE (debuggerUI.startTracing): This is the text displayed in
-  - the button to start execution tracing. -->
-<!ENTITY debuggerUI.startTracing "Start Tracing">
-
 <!-- LOCALIZATION NOTE (debuggerUI.clearButton): This is the label for
   -  the button that clears the collected tracing data in the tracing tab. -->
 <!ENTITY debuggerUI.clearButton "Clear">
 
 <!-- LOCALIZATION NOTE (debuggerUI.clearButton.tooltip): This is the tooltip for
   -  the button that clears the collected tracing data in the tracing tab. -->
 <!ENTITY debuggerUI.clearButton.tooltip "Clear the collected traces">
 

--- a/devtools/client/locales/en-US/debugger.properties
+++ b/devtools/client/locales/en-US/debugger.properties
@@ -25,68 +25,44 @@ pauseButtonTooltip=Click to pause (%S)
 # LOCALIZATION NOTE (pausePendingButtonTooltip): The tooltip that is displayed for
 # the pause button after it's been clicked but before the next JavaScript to run.
 pausePendingButtonTooltip=Waiting for next execution
 
 # LOCALIZATION NOTE (resumeButtonTooltip): The label that is displayed on the pause
 # button when the debugger is in a paused state.
 resumeButtonTooltip=Click to resume (%S)
 
-# LOCALIZATION NOTE (startTracingTooltip): The label that is displayed on the trace
-# button when execution tracing is stopped.
-startTracingTooltip=Click to start tracing
-
-# LOCALIZATION NOTE (stopTracingTooltip): The label that is displayed on the trace
-# button when execution tracing is started.
-stopTracingTooltip=Click to stop tracing
-
 # LOCALIZATION NOTE (stepOverTooltip): The label that is displayed on the
 # button that steps over a function call.
 stepOverTooltip=Step Over (%S)
 
 # LOCALIZATION NOTE (stepInTooltip): The label that is displayed on the
 # button that steps into a function call.
 stepInTooltip=Step In (%S)
 
 # LOCALIZATION NOTE (stepOutTooltip): The label that is displayed on the
 # button that steps out of a function call.
 stepOutTooltip=Step Out (%S)
 
-# LOCALIZATION NOTE (emptyGlobalsText): The text to display in the menulist
-# when there are no chrome globals available.
-noGlobalsText=No globals
-
 # LOCALIZATION NOTE (noWorkersText): The text to display in the workers list
 # when there are no workers.
 noWorkersText=This page has no workers.
 
 # LOCALIZATION NOTE (noSourcesText): The text to display in the sources list
 # when there are no sources.
 noSourcesText=This page has no sources.
 
-# LOCALIZATION NOTE (loadingSourcesText): The text to display in the sources menu
-# when waiting for scripts to load.
-loadingSourcesText=Waiting for sources…
-
 # LOCALIZATION NOTE (noEventListenersText): The text to display in the events tab
 # when there are no events.
 noEventListenersText=No event listeners to display
 
 # LOCALIZATION NOTE (noStackFramesText): The text to display in the call stack tab
 # when there are no stack frames.
 noStackFramesText=No stack frames to display
 
-# LOCALIZATION NOTE (noStackFramesText): The text to display in the traces tab
-# when there are no function calls.
-noFunctionCallsText=No function calls to display
-
-# LOCALIZATION NOTE (tracingNotStartedText): The text to display in the traces tab
-# when when tracing hasn't started yet.
-tracingNotStartedText=Tracing has not started
-
 # LOCALIZATION NOTE (eventCheckboxTooltip): The tooltip text to display when
 # the user hovers over the checkbox used to toggle an event breakpoint.
 eventCheckboxTooltip=Toggle breaking on this event
 
 # LOCALIZATION NOTE (eventOnSelector): The text to display in the events tab
 # for every event item, between the event type and event selector.
 eventOnSelector=on
 
@@ -135,21 +111,16 @@ blackBoxCheckboxTooltip=Toggle black box
 # LOCALIZATION NOTE (noMatchingStringsText): The text to display in the
 # global search results when there are no matching strings after filtering.
 noMatchingStringsText=No matches found
 
 # LOCALIZATION NOTE (emptySearchText): This is the text that appears in the
 # filter text box when it is empty and the scripts container is selected.
 emptySearchText=Search scripts (%S)
 
-# LOCALIZATION NOTE (emptyChromeGlobalsFilterText): This is the text that
-# appears in the filter text box when it is empty and the chrome globals
-# container is selected.
-emptyChromeGlobalsFilterText=Filter chrome globals (%S)
-
 # LOCALIZATION NOTE (emptyVariablesFilterText): This is the text that
 # appears in the filter text box for the variables view container.
 emptyVariablesFilterText=Filter variables
 
 # LOCALIZATION NOTE (emptyPropertiesFilterText): This is the text that
 # appears in the filter text box for the editor's variables view bubble.
 emptyPropertiesFilterText=Filter properties