Hi, I had 11031 tabs open. I decided to save all of them because my browser was getting slow. Just running "select all" was taking minutes, and resizing the window was very very sluggish. So I selected them all (screenshot 1) then I added them to a bookmark folder (screenshot 2) Then I went in the toolbar where that bookmark folder was created, and I middle-clicked on it to open all tabs again. (screenshot 3) And then the warning "you are about to open X tabs" appears (screenshot 4) And the problem is that the number is 8571 not the 11031 Why is firefox losing 2460 of my tabs ? Also, bookmarking all the tabs, took 4 seconds, while selecting all tabs too minutes. I think the "select all" function could do well to have some optimization as it starts getting slow with as few as 1000 tabs. And