You heard right! After only 15 months, the F.DS Chrome extension has been fully ported to Firefox! They apparently made some update recently to how add-ons works, and it suddenly went from a confusing mess than I couldn't get to work no matter what, to a really simple matter of just submitting the exact same files that I use for the Chrome add-on. They also have to manually approve the code of add-ons before they can be used.
So here's the link: https://addons.mozilla.org/en-US/firefox/addon/f-ds-extension/
It has all the identical features from the Chrome thread, and whenever I update one, I'll update both; though because of the approval process, updates for Firefox won't be available as quickly.
Kirian, Seprix, market squire; enjoy!