Hi Thomas ,
I'm not sure if you meant Zoom to 1 is adding the Z value for translate ? If yes , then the workaround is working.
One more user has sent this workaround : Text rendering issue in Firefox is fixed by adding a value to "Z" in translate.
So if you translate property looks something like this = X 2px, Y 10px, Z 0px. Just give the Z a value like 1 or 2 and its fixed.