With 300 tabs why do you want your tab bar horizontal? Doesn't it make more sense to have your tabs in a vertical sidebar so you can easily see them and scroll through them, like you can do in Firefox?
Yeah, this is actually one of the main reasons I use Firefox instead of Chrome. I really dislike Chrome's tab minimizing behaviour, not every website has a clearly distinguishable favicon and even if it did, I often have multiple tabs from the same website open.
I’ve tried it but found it too aesthetically displeasing when using a MacBook to not have a page centered if it’s supposed to be centered. It’s like the entire system is made to be used in a symmetrical way and I break it because of tabs. Doesn’t feel right
Hiding the bar defeats its purpose and with small icons I can fit more tabs horizontally without scrolling than vertically with tree tabs. Another reason would be if dev tools are open and they already take away half the horizontal space
So usually I have tabs in one window related to a single project or topic until they overflow (chrome will never scroll the bar. If it doesn’t fit the tab icons are simply invisible) at which point I just split in two windows that stay in the same Mac space for that project/topic