I find Proton's overall service quality, server speeds, and desktop application very successful; it's a genuinely good service. However, the browser extension (Zen, Vivaldi, etc.) unfortunately does not work properly on this computer.
The moment I click connect, the extension turns "green" (connected) within milliseconds, but no pages load and it throws a "Connection Timed Out" error. I have checked all network settings and DNS configurations on my system. While other competing VPN extensions work flawlessly on the exact same system, only Proton's extension gets stuck in this fake connection loop and fails to route traffic properly at the OS layer. This extension urgently needs an update to match the quality of the overall service. Until the extension is fixed, my rating is 1 star.

doesn't work it just makes my browser non functional, the app works fine though

I can't tell what's currently going on but starting since today I can't use the addon anymore. Every time I try to connect to a server the whole browser freezes and if I wait long enough, it crashes. I have to open Firefox in troubleshooting mode and remove the addon, because as soon as I enable it it tries to connect to a server and the browser freezes.

please stop spamming with review request

ich kann leider nur einen stern vergeben, das liegt daran, das man diese Free server nicht direkt auswählen kann. es gibt nur einen button schnelle verbindung und da wird dann mit einem freien server verbunden der dann aber lustigerweise nicht funktioniert, obwohl man verbunden ist, wenn man seine ip adresse kontrollieren möchte, kommt die vom nähe wohnort. tolle arbeit proton

Extension completely bricks FireFox. Fails to connect and remains stuck at which time, all functionality of the browser has stopped. Cannot open settings, cannot click the extension icon, nothing. Assumed it may have been the core secure function causing the hang up, so I did a refresh on FireFox. Reinstalled the extension and same issue happened. Had to do another refresh of FireFox.

Es de pago...

Needs an account to be usable...

Pops up annoying "please rate our app" spam, right when you need to adjust a setting.

Not working in Linux. Unresolved to date and not verbal about it.

For free it's a bull shit, worse than Browsec VPN.

It make the browser freeze then crash. (Midori browser)

firefox and linux broken. both versions have authentication persistence issues. log out, disable, re enable, re log is only fix. been like this for ages. why does the linux version suck so bad in comparison of windows....

With only this vpn specifically proton services are not reachable, but work with different vpn.
what a joke !!!

Proton is a really good service, but VPN latence is really bad compared to NordVPN which is one that I tried also!

I'm using this on linux mint, and basically whenever i install it, it will work for a few hours. Then the next day when i try to load any page, it will fail. Even if I disconnect from the VPN it still fails. The only thing that works is to delete the entire extension and redownload it and log in, which takes too long.
Need to fix this issue, otherwise app unusable

critical bug can cause firefox to crash and freeze when enabled and will cause it to also instantly hang on start up of firefox. need to run in "-safe-mode" to disable proton.