This should probably eventually be broken down into multiple smaller bugs but ae have a bunch of bootstrapped extensions used in various places in automated tests that need to be converted to webextensions: devtools/client/aboutdebugging/test/addons/unpacked devtools/client/debugger/test/mochitest/addon-source/* dom/plugins/test/testaddon dom/workers/test/extensions/bootstrap testing/mozbase/mozprofile/tests/addons/empty toolkit/components/search/tests/xpcshell/data toolkit/components/telemetry/tests/addons/* plus of course a bunch of stuff in toolkit/mozapps/extensions/test/ some of which will obviously need to last as long as we support bootstrap

Julian, you mentioned in another bug that you'll be removing devtools support for debugging legacy extension. Is there a bug for that work and do you have a timeline for it?

This is tracked in Bug 1497264. It is not prioritized for now, but we might clean this in 65. It would simplify the ongoing fission work, since that would mean one less client to refactor. It would also help with the current effort around remote debugging, if we don't have to migrate the features dedicated to legacy extensions. On top of that, for the devtools folders mentioned in the summary: - devtools/client/debugger/test/mochitest/addon-source/* is getting removed in Bug 1314057 already - current aboutdebugging tests are migrated to a new UI in Bug 1489226, so we can also get rid of devtools/client/aboutdebugging/test/addons/unpacked during the migration. Should happen in 65

browser_doorhanger_installs.js is due for a more comprehensive pass to weed out obsolete tests but for now this patch just gets rid of any bootstrapped extensions it was using.

This is a quick pass to weed out some obsolete tests and update others. browser_doorhanger_installs.js still needs a more comprehensive pass to get rid of obsolete test cases.

In most case this involves switching to webextensions. Some old or redundant tests are removed, other tets are cleaned up and modernized along the way.

https://hg.mozilla.org/integration/mozilla-inbound/rev/c5751a5efe5beaa4dc82089bc5ede81ee35f3291 Bug 1451532 Remove unused test addon r=kmag https://hg.mozilla.org/integration/mozilla-inbound/rev/f1a4ed8b794571fb9e8c3b7509b5aac5ec11282b Bug 1451532 Remove/replace legacy extensions in telemetry tests r=gfritzsche https://hg.mozilla.org/integration/mozilla-inbound/rev/27ace8afa15d5379b503aaab800251adf1e90a4f Bug 1451532 Convert test dictionary to modern packaging r=mstriemer https://hg.mozilla.org/integration/mozilla-inbound/rev/77e400a477280361e26b3b2d2c72416e0861eb95 Bug 1451532 Clean up bootstrapped extensions in addon manager mochitests r=kmag https://hg.mozilla.org/integration/mozilla-inbound/rev/c1d4918380adbf58e0fb231fb8de6940fce5f7c3 Bug 1451532 Remove unneeded bootstrapped extensions in addon manager xpcshell tests r=kmag

https://hg.mozilla.org/integration/mozilla-inbound/rev/8cef663e7653bb1939fa81a0e5ca79ea959808d3 Bug 1451532 follow-up: fix eslint on CLOSED TREE r=me

https://hg.mozilla.org/mozilla-central/rev/c5751a5efe5b https://hg.mozilla.org/mozilla-central/rev/f1a4ed8b7945 https://hg.mozilla.org/mozilla-central/rev/27ace8afa15d https://hg.mozilla.org/mozilla-central/rev/77e400a47728 https://hg.mozilla.org/mozilla-central/rev/c1d4918380ad https://hg.mozilla.org/mozilla-central/rev/8cef663e7653