When tab groups are loaded, Firefox becomes unresponsible for minutes (Unresponsive script)
- by unor
I have several tab groups (~ 20) in Firefox. I can start the browser without any problems. However, as soon as I …
click at the "Group tabs" icon in the toolbar, or
right-click on a tab and hover over "Move to tab group",
… Firefox becomes unresponsible/freezes for a rather long time (more than 2 minutes). It seems to load all tab groups (it doesn't load all the pages! I deactivated this in the settings). While this is happening, I get several "Unresponsive script" warnings, like:
Script: chrome://global/content/bindings/tabbox.xml:0 (most of the time)
Script: chrome://global/content/bindings/tabbox.xml:418
Script: chrome://browser/content/tabview.js:400
Script: chrome://browser/content/tabview.js:522
Script: resource://modules/sessionstore/SessionStore.jsm:3578
Script: resource:///components/PageThumbsProtocol.js:79 (rare)
Script: resource://gre/modules/XPCOMUtils.jsm:323 (rare)
(probably also other warnings, didn't record them yet, though)
On all of these I click "Continue". After ~ 2-3 minutes and 3-5 warnings, I can use Firefox again. Now I can switch tab groups without any problems.
Why is this happening? How can I prevent the long loading time? Is there maybe a about:config setting I could try?
I started Firefox in Safe Mode (= without any add-ons): the problem still exists.
