Google has rolled out "Privacy Sandbox," a Chrome feature first announced back in 2019 that, among other things, exchanges third-party cookies—the most common form of tracking technology—for what the company is now calling "Topics." Topics is a response to pushback against Google’s proposed...
Vivaldi does this out of the box: Tab grouping, tab stacking, tab stack renaming, vertical tabs, periodic tab reloading, etc.
Firefox has some catching up to do in this regard. I need extensions to do some of this. Tab stacking, for example, simply does not exist on Firefox, which means that my tab bar eventually makes me scroll horizontally.
Not badmouthing Firefox. Just saying that it isn’t the greatest in this area. Am still using it daily. I just don’t use it for tasks that require having many tabs at my disposal.
Edit: I didn’t say that Edge comes with most OSs. But Windows is the most widespread Desktop OS, so most people will have access to Edge “out of the box”.