I don't use TB, but firefox locks up for me frequently for the last several months. Does the lock unfreeze itself? In my case, it appears so after a while (say, half a minute) but I have also found that using the keyboard (so I just use the arrow-down keys to activate the keyboard now when it freezes) then unlocks it immediately. (It appears to me to a problem with the scroll button on the mouse which sometimes freezes with frequent scrolling.) I have not been able to track its source and happening reliably hence have not submitted a bug report. Though the bug report may well have to do with the kernel.
This never happened before Fedora 23 but there are so many variables that change with any upgrade that it is not clear to me what to blame it on.
Again, your problem may we different but I appear to have a similar issue. Sorry that my answer may not be of much help.
Ranjan
On Thu, 9 Jun 2016 14:37:11 +0200 (CEST) "peterlesterhuis@telfort.nl" peterlesterhuis@telfort.nl wrote:
Hi, I am aware that this might not be an appropriate topic for this list, but you never know. I am running TB on Fedora 23. Have been using TB for years without problems. Suddenly when I launched TB the little wheel kept spinning and still does. I can't send or receive email. Nothing has changed in my account settings nor was there an update of TB. Ik can still handle email via webmail on this account. This is a message in the error-console: Timestamp: 05/31/2016 02:57:52 PM Warning: Unknown property 'grid-auto-columns'. Declaration dropped. Source File: resource://gre-resources/ua.css Line: 175, Column: 19 Source Code: grid-auto-columns: inherit; I don't know if this explains the locking up. I tried to remove and reinstall TB, but the problem remains. I asked this question at the Mozilla support forum, but this does not seem to be a useful forum. I don't know how to solve this problem. Does anyone have a clue? Thanks in advance, Peter