FireFox no longer supported?

So I've noticed many problems with Lichess using FF 61.0.2

Fonts are displayed incorectly

Ctrl + Right Click forces context menus, a problem that "is being looked into" as of 2017 with no update.

And now I'm continually getting "Network Error" "Reconnecting"

What's the deal? Chrome works fine, which I guess is okay, but I'd rather steer away from Chrome if at all possible.

Is anyone else experiencing these problems? Does anyone have any solutions? I don't think FireFox is to blame, every other site I visit works fine. If these are just "me" problems, I guess I can just switch to chrome, but if it's a sitewide problem, I don't think FF should be listed as a supported browser.

I have no issues at all using the latest build of FF on lichess

I have always used Firefox on Lichess and the only problem of yours that I can reproduce is that Shift + right-click opens the context menu. This, however, cannot be avoided: Firefox implemented Shift + right-click as "open the context menu in any case" to still allow users to open the context menu if the websites block it for a normal right-click.

I was previously getting the Network Error/Reconnecting issue on FireFox occasionally. The fix there was just to restart the browser. It seemed to only happen after leaving the browser open for days with many tabs in it. So, being cliche - have you tried rebooting [your browser]?

Sometimes addons can cause problems. I had some, but then I discovered that a certain addon was responsible for them. See lichess.org/forum/lichess-feedback/firefox-problem#8

HTH

Firefox is working alright on my computer. So maybe some addons or cookies could have been causing problems on your side. Consider disabling addons and clearing cookies etc to see if it resolves the issue.