498089 - Huge performance problem opening menus after starting up Firefox

Status: RESOLVED FIXED

(Core :: Widget: Win32, defect)

Description

[Ria Klaassen (not reading all bugmail)]

On my computer I observe the following problem: 

STR:

- Start Firefox up with a new profile
- After a permanent decision as an answer to the Default Browser dialog, close and start Firefox again
- As soon as Firefox is open (here within a second) click on Tools

Result: it waits several seconds (about 8 seconds), then the color of the taskbar button changes to "unfocused" and also the focused state of the menu label disappears. When I click again, the menu rolls out instantly.

Expected result: expand the menu instantly.

Regression range: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=4897aa66c45c&tochange=1ea7f41ebd97

Bug 83056 is about menus. I'll make it blocking although I have no proof, just in case so it doesn't get lost, and is easy to undo.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

this should be fixed by bug 498079's check-in.