It doesn't work anymore.
I used it years ago and it was fine.
But I tried using it again today and doesn't work. Protonvpn.com doesn't work either.
And other reviewers say the extension's been broker for months at least!

This plug-in hasn't worked in months.

never wants to connect , its been months of trash 'working on it my ass'

thanks proton for reminding me to leave a review just now: proton ceo andy yen is an absolute embarassment and is actively trying to make proton worse by railing against his employees and calling the absurd and outlandish notion of 'reviewing code before publishing' "loser thinking" and just use AI more. there are several user reviews here from the last week that are majority 1 star and saying the extension doesn't work at all. go figure andy.

out of a sudden, the plugin doesn't work anymore, it just shows a spinning wheel

The Proton VPN Firefox extension is broken. It is ridiculous that this reconnect issue still exists.

Every time my MacBook or even PC wakes from sleep, the extension hangs on an infinite spinning wheel. It either hard-blocks internet access entirely or fails silently, exposing unencrypted traffic without warning. Toggling the add-on off and on multiple times a day is unacceptable.

I PAY for Proton... A security tool that fails open and leaks traffic defeats its own purpose. Do not use this extension on macOS until Proton fixes basic reconnect stability.

Still useless. Can't believe it has taken them THIS long to fix this shit. 1 star until it gets fixed.

The Proton VPN add-on for Firefox is boardline usable. Every time my laptop returns from standby the add-on is completely unresponsive, it keeps showing a spinning wheel forever. I have to disable and re-enable it. It's such a shame! I'm a Proton Unlimited customer, and for a company that advertises themselves as the open source secure and private alternative to big techs, it's shocking to see how they don't prioritize resolving this issue for one of the most popular browsers among their target audience. I do not recommend Proton VPN for anyone on Linux + Firefox.

Does not work: Extension cannot be opened, trapped in loading.

The longer I use it, the worse it gets.

Every time I use it, it will eventually bug out and cause the browser to look connectivity altogether until I open the add-on manager and disable/enable it.

And about a third of the time (sometimes more), it will just decide to connect to a different endpoint than the one I selected.

These are two serious issues for a VPN. Someone needs to fix it and fix it soon.

Edit: Apparently, Proton has known about this issue for MONTHS, and they're still replying to reviews with "We're aware of the issue, which our team is actively working on fixing." Add more people to that team or revert to a previous version. It's absolutely ridiculous for this to be going on for this long.

It does't work, I'm traped in infinite loading.

wouldn't load. when it did, it was sluggish. when i finally was able to click to connect, it popped up just as i did it, blocking me, begging me to review this product i pay a substantial amount of money to use every year. here's your review. i hope you're happy. but knowing it, it won't even stop popping up asking me to review it, will it?

Every 10 minutes or so when connected to a Proton VPN server with the extension, all websites stop working and the extension just displays a continuous loading icon when opened. This can only be fixed by either turning the extension off and back on again, or completely closing Firefox and reopening.

Slowed down my Firefox connection by 90% ~10Mbps.
Not seamlessly integrated with Windows Proton VPN apps, working separately.
Split tunnel doesn't always work.
Overall proton VPN performs better than Mozilla VPN but this extension definitely needs more work.

Only using this extension because Proton's actual native software pipeline on Arch-based distros is an unmitigated mess. The standalone protonvpn-cli is essentially abandoned to Python dependency rot, and the official GTK desktop app crashes on startup over basic package mismatches like pydantic-core. Having to downgrade a paid system-wide VPN down to a basic browser addon just to get a functional connection on an Arch-based system is ridiculous.

EDIT: The details are already in the review. The issue isn't my desktop environment; it's that Proton's native Linux app stack relies on uncontainerized, unpinned Python site-packages that break on modern Python 3.14 runtimes. Stop asking for screenshots of known upstream packaging failures and pin your dependencies so rolling-release users don't have to rely on Proton's browser proxy.

В России не работает. Ищите другое расширение. Хлам.

Actual dead weight for my browser, this extension seems to only work when it wants to and its not often it does. I'm constantly fiddling it because it'll randomly stop working completely and make me lose access to the internet.

Does not load, constant spinning circles.

App is Silently Crashing constantly while in use. The icon on the toolbar will be lit up green like it's connected and working fine, but no website will load, so I'll click on the extension and will just get an endless spinning wheel that never loads. This happens multiple times a day at random, making using the extension pointless.

Frequently I resume my session from suspend or hibernate on Windows, and the plugin popup window displays a spinner forever. Disabling and re-enabling the plugin does not help. Deeply unreliable.

Up until recently, Proton VPN has been a GREAT option for me. It was the only free VPN I trusted and used and it worked great. However as of yesterday it stopped working. I've tried to uninstall it but it actually won't let me, and if I try to click on the icon/widget it is just a neverending spinning circle. Also, I keep getting a popup that says "Your networks seems to be blocking Proton. The extension can't bypass this. Try the desktop app instead"

This is very frustrating to especially since the mobile version keeps workings fine for now. I originally thought it might be a problem on my end, but apparently this has been an issue for many other people. Dropping my review so hopefully others know they aren't alone

it never loads anything and just displays a window with a spinning circle on it, and the circle keeps spinning till I crash out and delete the extension

fantastic i wish it didnt break stuff