I didn't answer before because the answer is none. Not sure if anyone will see this but today Firefox recommended some extensions and one was OneTab. That let me turn all my tabs into a list. Then I could search those and (manually, one by one) open all of the tabs from a given site as long as it's in the title. I'm already down to 264 tabs (from 900+) today in just a little bit of time, and still going.
I didn't answer before because the answer is none. Not sure if anyone will see this but today Firefox recommended some extensions and one was OneTab. That let me turn all my tabs into a list. Then I could search those and (manually, one by one) open all of the tabs from a given site as long as it's in the title. I'm already down to 264 tabs (from 900+) today in just a little bit of time, and still going.