class not registered error
i have been using firefox as default browser for a long while.suddenly i am confrinted with "class not registered" when I try an open a link from my email.I am usung version 20.0.1 I have followed the instructions on your site to no avail. i have delted mozilla from program file etc and reinstalled with no good result. Effectively i am now not able to use Firefox anymore as my default browser.. surely, there must e a solution to this problem
All Replies (1)
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
- Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.
- https://support.mozilla.org/kb/Safe+Mode
- https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
You can also check for issues caused by plugins:
You can try to rename or delete the prefs.js file and possible numbered prefs-##.js files and a possible user.js file to reset all prefs to the default values.
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