TL;DR: Because I wanted one and couldn't find one.
Quite often when you're working/programming/gaming you want to quickly google something. The flow tends to be: alt-tab to browser, cmd+t to open new tab, google thing, alt tab back to main task. An hour or two later you have like 40 tabs open for garbage you don't need anymore.
With Tremor, you can quickly pull up a browser tab, do your task and then have the browser close sight unseen with a single hotkey.
Head over to the releases page and download the latest.
Launch the app then CTRL+ALT+` to summon browser. Note, it opens on the monitor your cursor is on.
Note You will likely have to trust un-trusted developers when launching as I haven't setup signing/notarizing for it yet.
Probably, but I don't know how yet - haven't looked into it (#1)
Yes, I'll do it later. I made this in 30 minutes so didn't really put much thought into features yet (#3)
Quake -> Earthquake -> Tremors.... I dunno, you name it!