I updated Iceweasel to version 27 from experimental today, and, after using it for a few hours, I'd like to report it works fine.
apt-get -t experimental install iceweasel
Thanks!
Tim
It only works fine if you don't use the kwallet integration add-on. With that extension iceweasel/firefox 26/27 crashes on every site that has a login box. It seems to be a bug in the new Javascript JIT Compiler Called ION Baseline. Who wants to use kwallet integration with firefox 26+ needs to disable ION - or disable the kwallet extension until this is fixed.
https://addons.mozilla.org/en-US/firefox/addon/kde-wallet-password-integratio/
http://kde-apps.org/content/show.php/Firefox+addon+for+kwallet?content=116886
https://bugzilla.mozilla.org/show_bug.cgi?id=961005