I just repeated the test with Chrome (also with uBlock) and similarly had no issues. Total RAM usage for Chrome measured in that manner was 16844MB, although i

I just repeated the test with Chrome (also with uBlock) and similarly had no issues. Total RAM usage for Chrome measured in that manner was 16844MB, although it's not an apple-to-apples comparison; I had Firefox running for a while before opening those 50 tabs. Safari launched about 40 tabs with no issues, and then subsequent tabs simply contain an error message: "The operation couldn't be completed. No space left on device". Total RAM usage seems to be about 20GB. The remaining tabs seem perfectly functional; there is no "crash" but obviously there seems to be some kind of limitation here. Not sure WTF that error is. Some Google results suggested turning off "hide IP address" but that had no effect. My boot drive has over 1TB of free space so that's not it. UPDATE: I installed Adguard for Safari, and was able to open 100+ tabs with no problem. Is there a browser that doesn't crash when I have 50 tabs open? To summarize, your answer seems to be "all of them, but you will perhaps need an adblocker and/or 32GB+ of RAM."