As of yesterday, firefox displays blank/white pages when trying to access vercel.com and v0.dev.
The same issue has been reported by other users on github, whereas the vercel repo is apparently used for CLI development only.
It sounds like a local issue with your browser. This happens from time to time with Firefox regardless of the specific site affected. I’ve seen a few solutions over the years.
Clearing browser cache may help
Make sure Firefox is updated to the latest version
Go to about:support in Firefox to access the Troubleshooting Information page which has some info and tools that can help with browser issues
You can use safe mode (now called Troubleshoot Mode) for troubleshooting, which can tell you if the problem is caused by hardware acceleration or an add-on
You can use the Refresh Firefox option to reset the browser to its default settings
I hope that helps! If that doesn’t get it working, the Firefox Community is a good place to ask. They’re experts on the subject and know many more debugging tricks for it than I do