Just for debugging, can you please create a fresh Firefox profile and try again?

I am also in Texas. Also using Mozilla Firefox on Fedora, on Spectrum / Road runner / Charter.

https://support.mozilla.org/en-US/kb/profile-manager-create-...

I personally don't mess with profiles. I download firefox developer binaries and put them in ~/bin folder which uses a different profile by default (no extensions for web dev test).