[spain]

In my experience I stayed with Firefox after I learned about tab groups. Sure you can run an extension on Chrome to do the same (and you can run extensions on Firefox to do things Chrome does) but after seeing just how much extensions can bog down a browser I prefer to run mine as close to vanilla as possible.

It's not even "if you download a poorly made extension your browser will be slower" but it seems like extensions have that effect in general. It's probably irrational but I've honestly seen a lot of the most popular extensions falling into this category, extensions like AdBlock and HTTPS Everywhere come to mind.