Hello guys, this would be a little awkward. Since I've run into this problem a limited number of times and I can't reproduce it. But it does appear frequently and is very annoying. I had to ask here for advice and help. The device I use is a MacBook, running the official version of Firefox, and as far as I know this problem has been there for at least half a year. I'm used to keyboard operations, usually I use Cmd+T to create a new tab, then the cursor is focused on the address bar, and I type the URL. Since I'm typing an address that I visit often, maybe I just type the first few letters, the URL gets autocompleted, and then I just hit enter and the page opens in my new tab. But sometimes I hit enter twice (eg not English input method). At this time, I noticed that in addition to the URL I wanted to open, there's an additional tab. This tab was blank, or the page I just visit. From my personal understanding, I may have performed the above operations to create a new tab or clone a tab at the same time. But I don't think my operations will cause these to happen concurrently. Below are the extensions that I have installed, in my impression I don't get this bug in Windows, but I don't use Windows a lot. In addition, my MacBook keys may be sticky, or it may be a system problem.