Personally I've used TabCenter Redux and now Tab Center Reborn, tabs on side allow to see titles no matter how many tabs we have open, easy scrolling and groupi

Personally I've used TabCenter Redux and now Tab Center Reborn, tabs on side allow to see titles no matter how many tabs we have open, easy scrolling and grouping while not waste vertical screen space, witch is rare on modern 19:9+ screens (while we do not need much space on sides, since most screens are big enough)...