I’m still going strong with my tabs goal, as I’ve described on the forum before. It works really well for me, and it has the advantage of being exceedingly simple. In short: I track the number of browser tabs I have open, and I have a whittle-down goal with a rate of -2/day. Whenever I get down to a low number of tabs I archive the goal, my tabs inevitably balloon again, and a few weeks later I restart it.
Mind you, this probably only works because I’m happy to have a four-digit number of tabs open so long as the trend is downwards—I currently have 1441 tabs open, and that’s fine because I know that number is trending inextricably down. This has worked amazingly; it’s my second-longest running currently active Beeminder goal, running with only short breaks since April 2018. It’s helped me not only keep my from burying myself under an ever-increasing amount of open browser tabs, but also to actually get to more than a few really interesting things I have left open as browser tabs with only the indefinite intent to read them at some point in the future—the need to close tabs by the end of the day bring to the forefront the decision of whether I actually want to read it or not. (In many cases the answer is yes, and I read it then and there in order to close it, and thus I get to read something I otherwise might have put off forever. And also in many cases the answer is no, I get a quick win in closing a tab “for free”, and I’m no longer burdened with the weight of a browser tab I never would have gotten to in any case.)