1708029 - Library menu makes the browser hang

Status: RESOLVED DUPLICATE of bug 1701451

(Firefox :: Menus, defect)

Description

[will.js]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0

Steps to reproduce:

1. Put the "Library" button on the toolbar
2. Go to about:newtab
3. Click the Library button
4. Click "Bookmarks" or "History"
5. Click the back arrow

Actual results:

After clicking the back arrow and returning to the top level menu, none of the other options are clickable. Additionally the rest of the browser seems to be non-responsive. This does not seem to happen in normal tabs.

Dragging the window around my desktop seems to unfreeze the browser.

Expected results:

Clicking back into the top level menu should not freeze the browser, and the other options should be selectable.

Comment 1

[will.js]

Attachment: Video of behavior experienced

Comment 2

[will.js]

It actually does happen in other tabs that are not about:newtab.

Comment 3

[:Gijs (he/him)]

Unfortunately I cannot reproduce myself, though 1705085 looks related. Can you collect a profile of the hang with the Firefox profiler? https://profiler.firefox.com/

Comment 4

[Miko Mynttinen]

This is almost certainly bug 1701451.