piroor/treestyletab — Issue #253: Child tabs for some parent tabs disappear after restarting Firefox ("collapse/expand tree of tabs" is unchecked)
Author: necromancer44
Created: 2012-02-28 05:01:22+00:00
State: open

I am running Firefox 10.0.2. This problem didn't use to happen in Firefox 3.6. I am not sure if it happened in Firefox 9.
I am also running 32-bit Windows 7 Ultimate.

When I open child tabs by right-clicking a link and clicking "Open Link in New Tab," the child tabs appear perfectly in the tab bar. However, when I restart Firefox, for some parent tabs, all their child tabs in the tab bar disappear. If I open a new child tab, it would appear in the tab bar beneath the parent tab, but the child tabs I opened during the previous session are not visible. When I restart Firefox the next time, the new child tabs will have also disappeared from the tab bar. In fact, the child tabs are still actually there as I can view their contents by scrolling to them using ctrl+tab but I cannot click on them in the tab bar because they are not there.

In options, I have "Allow to collapse/expand tree of tabs" unchecked. This is not a problem involving collapsing children tabs because even when I click on the parent tab, the child tabs do not appear.

One final thing to note is that when I point the mouse to the parent tab, it does not get highlighted and if I click on it, the contents of one of the hidden children tabs will show in the browser and not the parent tab that I clicked on.

Note that I have many windows open and many parent tabs, and this only happens on some windows on some parent tabs like my yahoo email and Slashdot website. I have tried closing the problematic windows and reopening the parent tabs in new windows, but the problem would follow the new window.