Review for Whois Lookup & Hosting & DNS & Site Flags Firefox by IByte
Rated 1 out of 5 stars
I installed this add-on on Firefox 33.0.1, but it did not work, no flags or buttons appeared (it was listed in the add-on manager, though). Then I tried to uninstall it, now my address bar is gone and session restore and customise UI don't work anymore. It essentially broke my browser, I'll have to restore my profile somehow.
To create your own collections, you must have a Mozilla Add-ons account.