This is one of the essential add-ons on any Firefox. At work, I have to use Windows Vista, so I'm stuck with Firefox 52 ESR, but luckily, version 1.4 works wonderfully there! Recently, I noticed it works somewhat better than on the Firefox Quantum at home: I cannot edit password field entries with version 2.0! I know the field names, I know the data there are in them, but they simply don't show up on listing or searching. I wonder if that's a Firefox Quantum limitation (for improving security, that ends up opening a security hole, because I cannot delete those fields' data).

Looking forward for a sync across devices.
Does not work on mobile FF - impossible to interact (copy etc buttons do not respond).

fantastic

Would be nice if I could disable "remembering" certain field types or sites. Otherwise, a great replacement for lazarus :)

Just works fine on different sites.

I love how this can help me save my work when I'm typing directly into text fields! This extension is a must.

Very unreliable. Doesn't show the latest entries by default, has a messy interface and truncates whatever you've typed randomly. Borderline useless except for finding short messages.

This add-on is a life saver when a site borks and removes the text you've drafted, or reloads for no apparent reason, or just decides to log you out. Couldn't live without it.

Just the thing for tax forms that might take days to complete but say:

"One-time submission

The online FBAR form does not allow you to save your progress during
form completion as it is designed to benefit filers who are ready to
file the FBAR today. If you have gathered all information needed to
complete and submit the FBAR in a one-sitting, then the online form
might be right for you."

Finally found something that replaces Lazarus completely for me. Textarea Cache didn't have dropdown list history, this one does.