extracted from #1424 (comment)
backspace doesn't work correctly on the web, in the example deleting multiples chars in a row with backspace make the text alternates between two differents values.
deleting "brown", I get:
The quick rw fox jumps over the lazy dog.
if I click anywhere on the text it alternates with:
The quick bo fox jumps over the lazy dog.
If I select some text, the alternation stops.