Any way to solve this? It doesn’t happen with brave but it is a browser that is somewhat buggy on Linux. (I am using kde plasma 6)
Hello! 
Have you tried to disable DNS over HTTPS in the Settings under “Privacy & Security”? I’m using Firefox 135 with Cachy, and it sometimes gave me trouble when it’s set to “Default”. Try to disable it and see if the problem still persists.
Although this is a neat feature, you can mitigate the disabling by setting a secure third-party DNS in your router. I’m using Cloudflare (1.1.1.1) all the time and it works like a charm. Firefox uses the Cloudflare DNS with this security feature as well, so it’s just better than to use your ISP’s standard DNS anyway.
