Welcome to Opera ! Just donated after seeing this, had previously donated as a longtime FireFox user. Still using this great extension (the pre-WE ver.) there, mainly with FF Legacy 5290. I recall reading though the DTA blogs, re all the travails with the new add-ons architecture, and the doubts as to whether DTA could continue at all. I'm sure glad that it did ! I really don't like -- at all -- many of the things Mozilla has been doing with FF, after 5290. They seem to be doing all they can to ruin it. In any case, Opera has shown itself to be superior in several areas, such as the odds of being able to actually print out what you see onscreen, in a complete and ungarbled fashion.
I do hope that you can be more responsive to user queries or comments than seemed to be the case in the past.