Deckmaster wont display in firefox

[KitteyWolf]

[whoops i clicked enter before putting anything. new to github]

I'm using firefox, and i've only just had the chance to watch a magic arena stream live. deckmaster wont display- the little icon that is meant to show up on the window shows up for a split second then goes away, not allowing me to activate it. It does this even with all my adblockers disabled with a complete reboot of firefox. I also use better twitch tv, and frankerface z

possible unrelated when the video is not in theater mode it shows up weirdly.

[jimmy22666]

I'm also having issues with it working on firefox. It's a shame as it's such an amazing extension and made watching MTGA so much nicer especially for the live drafts. I've tried disabling all addons, restarting etc.
It's always worked for me without issues until about a month ago and now I just can't see anything.
I can see the extension button at the bottom of the screen and it is enabled, toggling 'visible' pops a frame up around the stream as if it's turning on but it doesn't change anything :/

I know this kind of stuff is hard and all the different browsers and versions are a pain to get working but I would be soo appreciative if a fix could be found as I absolutely love this extension!
Thanks very much, fingers crossed