I've run a comparison of (most) of the currently available tab suspender/tab discard addons, and Total Suspender came out as the clear winner: minimal permission footprint, works reliably, and provides the right amount of customization.

Thanks a lot, k5md for writing (and updating) this quality addon. Let me know if there's a tip jar I could go and check out :)


// Full comparison //

Total Suspender: this addon, my favorite

New Tab Suspender: runner-up, almost as good as Total Suspender, but could use a few more options

Tab Suspender: lacks several relevant options

Auto Tab Reaper: same as previous, not customizable enough

Auto Tab Discard: my previous favorite, but became unreliable lately, and requires unnecessary permissions