Backed out changeset dfb60edacd2f (bug 1363685) for failing devtools/client/aboutdebugging/test/browser_addons_debug_bootstrapped.js. r=backout

devtools/client/locales/en-US/aboutdebugging.properties

@@ -37,10 +37,10 @@ notListeningForFetchEvents = Not listening for fetch events.
 # This string is displayed as a header of the about:debugging#addons page.
 addons = Add-ons
 
-# LOCALIZATION NOTE (addonDebugging.label):
+# LOCALIZATION NOTE (addonDebugging.label2):
 # This string is displayed next to a check box that enables the user to switch
 # addon debugging on/off.
-addonDebugging.label = Enable add-on debugging
+addonDebugging.label2 = Enable add-on debugging.
 
 # LOCALIZATION NOTE (addonDebugging.tooltip):
 # This string is displayed in a tooltip that appears when hovering over a check