alt Hacker NewsIf you us Mullvad browser, which has built in Mullvad proxies, this isn't an issue because it doesn't use wireguard.
The browser also has a cool feature in the browser extension called Random mode. This gives you a different IP for each site, improving your privacy.
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It's not going to be an issue for most things which have been properly thought out as they will have proper isolation between servers which should have separate identities. Reusing the same VPN for all servers and relying on an eventual expiry before the IP changes is fundamentally not a great approach to rely on for isolation.
Which you absolutely shouldn't use, because just like Tor Browser before, a vulnerability in the browser can be immediately escalated into decloaking your real IP. Ideally the proxying doesn't even happen on the same machine.
You can probably also use it on regular Firefox.