Seeing this pretty consistently on our Linux 64 Mozmill machines: SUMMARY-UNEXPECTED-FAIL | test-cloudfile-attachment-item.js | test-cloudfile-attachment-item.js::test_upload_cancel_repeat EXCEPTION: Context menu has been opened. at: utils.js line 447 TimeoutError utils.js 447 waitFor utils.js 485 assert_can_cancel_upload test-cloudfile-attachment-item.js 155 test_upload_cancel_repeat test-cloudfile-attachment-item.js 85 Based on when we first started seeing this failure, and what kind of commits went into comm-central, I'm going to go out on a limb here and wager that mozilla-central broke us.
Oh, also note that we're only seeing this on *debug* builds so far.
Created attachment 639334 [details] [diff] [review] Patch v1 This patch allows us to side-step the weird menu-opening bugs we see sometimes by triggering the menupopup's "onpopupshowing" function manually. According to this try build, I think this problem is fixed: https://tbpl.mozilla.org/?tree=Thunderbird-Try&rev=75ebfa16e7f1