"Always keep these sites loaded" removal option hard greyed out

[kentfredric]

I have some cruft entries in my "always keep these sites loaded" list because the domains
in question are no longer active.

However, the "use this list" mechanism doesn't work, highlighting the items doesn't activate the "remove" button.

[maezred]

Hm, it seems that a browser update broke the remove button. I'll look into it. In the meantime, you can head to about:config and search for extensions.bartab.whitelist then just manually remove the entries there. Entries are separated by semicolon.