The presence of a file with Latin1 (ISO-8859-1) encoding or opening a website that send text in Latin1 break the browser and the text editor. I'm assuming any block of text that contains non ASCII characters and it's not encoded in UTF-8 will break stuff.
This assertion fails but it's perfectly sensible if the non ASCII text is in UTF-8:
USERSPACE(35) ASSERTION FAILED: m_ptr[offset] >> 6 == 2
./AK/Utf8View.cpp:208
I suppose everything is assuming a perfect world where everything is UTF-8.
Just to be clear I was trying to open a page that is basically ASCII but with a single 0xEA (ê in Latin1) byte
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