Context: I usually open pages by searching from a search widget on my home screen. I use Firefox Nightly on Android.
Problem: I do a lot of searches each day. I need an easy way to close/discard the current tab, otherwise my "Jump back in" fills up with pages I am already finished with.
Suggestions:
1. Replace the rarely used + (new tab) on the toolbar with an x (close tab).
2. Also, pressing back should close the tab. If I back out of a page, I don't want Firefox to remember the page in "Jump back in".
(I know I can open the tabs screen and x or swipe the current tab to remove it, but this is two gestures, and one of them is not near the bottom of the screen. Making it easier to perform in one gesture would make it more likely that I keep my active tab list tidy.)