https://support.mozilla.org/en-US/kb/update-firefox-latest-version?cache=no Did you update Firefox to the latest version 66.0.4 May 5, 2019 Fixes add-on certificate issue. 66.0.5 May 7, 2019 Further improvements to re-enable web extensions

Have you contacted Last Pass support?

Hi-- Thanks for replying. I have told Lastpass, I have already updated to latest Firefox version. This has been going on for a while, but between the firefox updates and the lastpass update, it's hard to tell where the problems are coming from. My extensions disappeared briefly--that was firefox, obviously. I'll hope Lastpass can tell me something.

pigtail said

Forms don't fill. Have cleared cookies, caches, etc. Works fine in Chrome.

What works in one isn't the same in another so doing a comparison doesn't tell much here. Did you uninstall the addons and reinstall it to see what happens for firefox.