Update since 16.5.2: All issues I previously had are fixed and it finally works flawless for me. Kudos to the team.
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Old review pre-16.5 versions:
Would work like a charm, if there wasn't the big issue that it slows down page loads after a while significantly. Have to disable it completely in order to get page speed times back to normal.

I can't open the Keeper software because of the following note from Firefox-Mozilla:
Please update your Keeper app to the latest version from the App Store or from KeeperSecurity.com. If you are using a web browser, please reload the page or clear your browser cache.
Nothing I try seems to help make the Keeper P/W shortcut work.
HELP. Kermit, 10/29/2023

It keeps telling me that it's not up to date even though it is. It will not run.

Breaks very often with browser updates.

I loved Keeper - but ran into a very frustrating issue about a month after I started using it. Even with my being cranky, the support team didn't give up. After a bit of back and forth, they helped me resolve the issue. I appreciate the follow through. Good customer service makes all the difference!!

Slows down web pages, especially Github. Auto-submit still doesn't seem to actually do anything.

It stopped working. It sucks...

In terms of encryption, reportedly among the best. In terms of user experience: personally, very bad. It does not "see" where it must fill information. Most of the times, automation does not work: you need to open the vault and copy-paste bit by bit. And now, the extension no longer works because the update does not work. I won't renew my subscription, that's for sure...

Would have been nice to have an option to turn of the constant message reminding me to log in on every request.

I was forced by my employer to swap to Keeper and god damn if it's not the worst password manager I have ever used.

Login pop ups on all sorts of pages I don't want it to, with no option to permanently disable it on a specific sub page.

Worthless extension logs me out every few hours even though it's set to only do so once per day.

My personal account, which I'm only using because you get one free if you have an enterprise account, also logs out multiple times a day even though I have set it to NEVER log out. WORTHLESS.

Literally worse than the lastpass extension from a decade ago. I'd be screaming and crying at work about it if lastpass hadn't had so many breaches lately, literally only reason to use this garbage.

I hate this app/extension so much I will probably pay out of pocket for another company rather than using my free account. And I'm cheap as heck.

Slow and nearly useless on Firefox/Ubuntu. It takes forever to load, it it loads at all. It's not great on my Mac either.

Makes firefox extremely unstable, had to reboot my a couple of times before I found the culpit.