Home | Legacy Firefox Extensions | Content Policy | Contact

URL Security


This add-on works best in the original plain Firefox browser and in Personas too.

Known Issues and Workarounds
- Firefox Developer Edition 55+
This add-on will not work correctly without DOM Inspector add-on installed:
Get it here: https://addons.mozilla.org/en-US/firefox/addon/dom-inspector-6622/
This add-on has no affiliation with DOM Inspector add-on.

- Firefox Compact Themes
Browser restart is needed If you enable Firefox built-in theme after this add-on was installed.

XX Support for Firefox browser ends in version 56 XX
As this add-on uses legacy APIs and is based on XUL/XPCOM, hence migrating to WebExtension is not possible.

++ Support for Pale Moon browser starts from version 26 ++
If you like this add-on, kindly spread the word. Thanks.

Download files:


This page is part of the LegacyCollector website.
Disclaimer: All material on this site is property of their respective owners and available under
open licenses to the best of our knowledge. If you are an author and would like anything removed,
then please write an e-mail to legacy [at] collector dot org.