@leocg
I repeat again: it sounds like a kind of illness "I've opened so many tabs, I don't remember how many and why, now I gonna search through them with key words". What?
I cannot search for closed tabs. I work with databases, they contain dozens of pages similar from the point of view of the search function, having similar headings, containing the same keywords, no one will have a desire to sort the search results. I use torrent trackers and use filters to get a list of the maybe-pages-I-need, some of them then appear to be not the ones, I close them, then, having checked the rest, I still want to get to those pages I had initially rejected. These are the cases. What you have for "search in tabs" is not a normal case for a normal person to behave.