Worked great before... now I keep getting this error even though I never changed my password or anything...

"Authentication error
If you recently changed your password on the Private Internet Access website then re-authenticating with the extension might fix this error."

EDIT: Gave back the five stars because it is now working as it should. I still don't really know what caused it but so far I can navigate with no errors.

A few issues connecting to sites such as waiting for TLS handshake to be done while under the VPN, servers sometimes will say the latency is at 0 or 100ms but if I go back and forth it will update with the correct server latency. All in all I'm very happy that Firefox has a extension!

Super easy to use and connects very quickly and reliably. Credentials persist perfectly now. I have noticed occurrences where logging into certain systems is thrown off by the constant new locations but that's exactly how VPNs function and entirely the point to their use. People having issues logging into certain websites that use IP to identify you should expect their systems to be concerned with the constant changing IPs. I have found ways to reduce the confusion by picking a node for certain types of activities like banking and online shopping and connecting to them every time so the IP stays consistent.

Cannot be used because I'm on Firefox Legacy.
Why then, was I allowed to download, install it, and waste my time?

If you choose not to make it compatible with Firefox Legacy, then flag it as such in the Add-ons market so people don't waste their time.

Nice to see the extension come to firefox. However, login data fails to persist between browser restarts where "privacy.clearOnShutdown.history=true". Unlike chrome version -- this necessitates re-entering username & password on every restart.

I am not happy as this VPN service has affected my online banking access. I have received a notice form Microsoft Security to warn about unknown activity. I am still trying to access other issues that have been created by this specific VPN service. If their tech people in the next few days fail to sort out my issues I will cancel and demand a refund. They were rated high by PC Mag and while I read some negative comments about their service I went ahead with it due to the PC Mag rating. I should have paid attention to the negative comments which I might add also included comments about poor tech service. Additionally unlike other VPN services I have tried because they offered a free trial this one does not (Big mistake in my opinion on my part) Also now I have downloaded their system unlike other VPN services they do not provide a webpage logon to which I can go to find out possible solutions to my problems and as well how to temporarily log off their system, and in my view why? I also changed the settings on Google Chrome to both allow their system and to allow my speakers to work (another problem) and very apparently their Google Chrome extension is bogus as it did not change the problems

Firefox Add-on not working (Firefox 60.0.2 in Ubuntu 18.04).
You can enter your username, but field for password does not respond.

This add-on continues to disappear from my taskbar making it impossible to switch locations. It doesn't help either that the PC app doesn't open once you download it

My issue is that when using the web extension, email is stamped as four hours later than real time. Eg, when it is 6pm on the east coast of the US (my present location) gmail and yahoo mail are timestamped 10pm. My system setting is correct, my gmail timezone is correct, and I am connecting to servers in my time zone (New York, Toronto, Atlanta) yet the problem persists. This is not the case when I use the desktop client. I've stopped using the browser add-on as a result.

Smooth, lightweight and excellent value.

Simple to use, and it works smoothly! The best and most trustworthy VPN provider is getting even better!

Works as expected. PIA is the best VPN provider. Glad they finally have an extension for Firefox users.