I am using the same version of Firefox 63.03 (64-bit) and I have no issues with True Key, I also downgraded it to 60.30esr and I also found no issues connecting with True Key.
Just to be in the safe side, I had this tested on other systems and found no issues with these versions.
My suggestion is to download if it is not done already the Chrome extension and once confirmed it works with it, please reinstall the Firefox True Key extension.
You mentioned for me to download the Chrome extension. Please explain. Why would the Chrome extension be used for Firefox and how do I do that? Please provide the download link and instructions, and I'll be happy to try. I've been using - https://downloads.truekey.com/firefox/latest/truekey.xpi
True Key installs and looks active. It's just never prompts for username/password when I browse websites that require authentiation.
From what i see the issue might be isolated to your client (PC) because I was able to use True Key with the version you mentioned and also witht he downgraded ESR version on multiple machines.
Pleasde reinstall Firefox True Key extension and let me know the results.
mine works on a few sites but it still will not work on eBay, Instagram, Newegg, Paypal, twitch.
on firefox 63.0.3 (64-bit) truekey 188.8.131.5211
and Instagram, Newegg, Paypal, twitch all work on chrome. eBay won't put the right password in chrome
I will check on this for you, it might need to be optimize to work for all sites using the latest Firefox version or the other possibility is that several websites need to have their content script optimized if changes have been done by these webpages.
In any case I will look into this and will get back to you as soon as possible. Having said that it is a different issue altogether from what jsessa55 reported earlier, I believe in this case the issue seem to be bigger and touching all websites as he is not able to login to true Key using the True Key Firefox extension.
Auto-login issue to eBay should be fixed by now after we released a form change yesterday.
For the other web pages you reported, chnages are more complex so the fix release might take longer to be released. I will keep you updated when that happens.
Again, if the issue you are experiencing is that you cannot connect to True Key at all using the Firefox extension with the latest FF version, the issue is probably laying with your client.
My recommandation was to reinstall the TK Firefox extension since you said that it worked well on Chrome, I also confirmed earlier to you that I have tried reproducing this on the same version you are running and also downgrading it and I experience no issues.
Please reinstall your True Key extension on Firtefox and let me know the results.