I've noticed that 1Password's browser integration doesn't work with Firefox Nightly, at least when installed direct from Mozilla's website. I'm on Fedora 36 and it seems that the browser integration works fine with the pre-installed Firefox.
I know I could just use the pre-installed Firefox, but I'd rather avoid it if I could. Odd reasoning but I've been interested in the entire Firefox scene for a while and am moderately active in the community, and would much rather stay on the Nightly branch.
I've tried installing Nightly (putting the extracted folder) into both my personal Documents folder and the system /opt/ folder, but didn't notice that that helped with anything. I also moved the .desktop file back and forth from my personal account to the system applications folder, but no dice.
I know this is a pretty niche issue, but I figured it was worth a try to report this and see if that could help get this fixed. :)
1Password Version: 8.7.1
Extension Version: 2.3.5
OS Version: Fedora 36