I spent some time freaking out this evening as I nonchalantly upgraded to Firefox 43 to find it automatically disables LJlogin (which I need like air, water, shelter, wifi). I contacted the developer to let him know, and he said he hasn't started work on re-coding so that it meets their standards, but he knew it was on the horizon, and for now we Firefox/LJlogin users still have an option:
1. Paste about:config into your browser window
2. Scroll down to xpinstall.signatures.required
3. Set it to false (which I believe I did by double clicking)
You can learn more about this
here. This page also warns that version 44 (not out yet) is going to remove the ability to override.
So, if you want to keep LJlogin do NOT upgrade to Firefox 44 unless LJlogin has been verified by Mozilla. The good news is that the LJlogin developer sounds like he will be working on getting it verified eventually. Check
here or
here for news on that front. Not that either has been updated in a long while, but since he responded to my LJ PM in a matter of minutes I wouldn't be surprised if he does update when he has news. (OPTIMISM!)
Alternatives: The link above to learn more mentions a developer and nightly mode of Firefox that still include override features even in planned, future versions. And
LJ Juggler works similarly on Chrome.
If you know any more about this situation or have other good alternatives for toggling between journals please let me (us) know! I'm definitely no expert on the tech stuff
(she says from the journal of a character who is an expert on the tech stuff.)See comments for updates.