Safari is also the only desktop browser that can handle my "power user" web browsing style. Chrome completely falls over after a few dozen tabs are opened. Firefox holds up better, but still starts starts stuttering when it gets to 80–100 tabs. Safari keeps going fine with several hundred tabs.
Edit: For the folks who are apparently offended by my browser use, I’ll elaborate:
Why would anyone want a large number of tabs, you ask? Well, when researching a topic, it’s often useful to open in tabs, breadth-first style, every potentially relevant link in a network of {academic papers, historical web pages, wikipedia articles, ..}.
For me, it’s much more efficient to partition my browsing tasks into {open a bunch of tabs without looking closely at the content | go through the list of tabs in order, lightly skimming the content and closing any that aren’t relevant | dive deep into each relevant tab, reading carefully, taking notes, etc.}. I find that, as alternative strategies, both (a) trying to entirely finish with one tab before opening another, storing its hyperlinks in a text file for later examination, or (b) only opening links in the same tab, using the browser history as a linear linked list of my current place in the browsing tree, are much less effective.
Theoretically, my strategy could be done with a set of bookmarks, a list of links in a text file somewhere, one of those "read later" apps, etc. In practice, I find that it works better for me to just keep the tabs open in my browser. YMMV.
Anyway, now imagine you have 4–5 different long-term ongoing research interests/projects (possibly related). Sometimes, when diving into one topic, you end up stumbling across a useful tangent into one of the other topics you care about. Occasionally, the thing you stumble on is important enough to temporarily set aside the first topic (tabling the in-progress search by leaving all of the, say, 50 currently open tabs in their own window) and open up a new window to dive in on the second topic. Alternately, imagine you receive an important email, and need to suspend the entire research session for later. Again, it’s easier to just keep the window open with all the tabs in it, rather than closing everything and reconstructing it later.
This might not be the browsing style for everyone. But it works for me, and Safari is the only browser I’ve tried which holds up.