New xpcshell-test option to aid debugging failures when run in parallel

tl;dr We now have a --verbose-if-fails option that outputs a log if a xpcshell-test fails when being run in parallel. If you ever have seen output from xpcshell-tests like this:  0:05.68 TEST_START: toolkit/components/search/tests/xpcshell/test_remove_profile_engine.js 0:08.57 TEST_END: FAIL

Re: Enable cargo pipelining to speed up Firefox builds

Also sprach Nicholas Nethercote: > - Set the environment variable `CARGO_BUILD_PIPELINING=true`. And if you want to include it in your mozconfig I imagine you likely have to do something like this: mk_add_options 'export CARGO_BUILD_PIPELINING=true' _

Did Firefox's JS Debugger improve for you?

Hi everyone, Tl;dr: Please help us with testing/feedback on Firefox DevTools after we fixed long-standing performance & quality issues in Firefox’s JavaScript debugging capabilities. During Firefox development, from platform to frontend to web compat, JavaScript debugging is a key aspect and need

Unplanned Phabricator Update - June 4th 2019 between 14:00 and 15:00 UTC

Due to missing the normal update window normally on Mondays, we will be deploying a Phabricator update to add new functionality tomorrow June 4th between 14:00 and 15:00 UTC (10:00am ET). Upgrades usually have no visible impact on the user; however, some updates may cause Phabricator to be pa