Firefox is totally doable on that much RAM. Not going to be pleasant, but usable. You want to strip down as much resource usage as you can: inside Firefox throw in uBlock Origin and Tab Unloader; outside Firefox use a stripped down desktop like XFCE or just a straight low resource window manager with no desktop environment (I was a big fan of WindowMaker back in the day).

Link to the paper he’s referencing:

https://gwern.net/doc/psychology/cognitive-bias/2025-tully.pdf

It’s a Unicode CJK variant. There are a bunch of characters that Unicode considers to be the same character but with small regional differences (e.g. how it’s written in Mainland China vs. Taiwan vs. Japan vs. Korea, etc.). Since the region isn’t encoded in the character, you’re seeing whatever your system locale and font default to. For web pages, you can specify the region inside the HTML or HTTP headers and hopefully you get the correct character rendering, but that also requires you to have a font installed that includes the variant.

https://www.typotheque.com/articles/understanding-cjk-regional-character-variants