Recent answers to I keep getting a Yahoo DNS error handler page, and can't even access the add-ons page to disable it because it redirects me to the Yahoo DNS page immediatelyhttps://support.mozilla.org/ar/questions/10010112014-05-14T00:09:20-07:00Open the Help menu and choose Restart Firefox with Add-ons Disabled. Remove any offending extensions2014-05-14T00:09:20-07:00Gingerbread_Manhttps://support.mozilla.org/ar/questions/1001011#answer-575078<p>Open the Help menu and choose Restart Firefox with Add-ons Disabled. Remove any offending extensions. For details, see the "Uninstall from Firefox Safe Mode" section of the following article.
</p>
<ul><li> <a href="/en-US/kb/cannot-remove-add-on-extension-or-theme" rel="nofollow">Cannot remove an add-on (extension or theme)</a>
</li></ul>