No it is the Forum (or Source Forge). It is as slow the last 1.5 days as it was not anymore for ages.
It seems to have much traffic.
Could be also Internet in US on a Week End. This is the only page located in the US that I visit often.
You do not have to reinstall the browser often. If You suspect corruption create a new profile and check whether that behaves better. Profiles can get corrupted because of the constant writing operations and if You often install new extensions. The install only gets damaged rarely ( reasons when OS or hardware has a problem - crash, energy failure, inproper shutdown, new bad sector ... ).
The nrowser version that You want to use all the time must be set as default else some protocol calls might be delegated to the default handler by Your Windows system