Text does not scale on firefox

[nowakf]

Book text doesn't scale in Firefox 90.0.2, also chromium. It makes it pretty hard to read if you have bad eyesight.

[ekangmonyet]

I would advocate for Firefox Reader View. If the reflow is accurate and stable, it can also be released as epub format.

[fennecJ]

I think the reason why text can't be scale is because in html.cfg, line 13,

font-size: 1vw;

When an element using vw as size unit, its size will be depended on the
width of the browser window size and won't be effected by scaling ratio
of browser. I have tried to use em or px instead, however when scaling
the text, the code blocks' layout will be malformed and I currently can't
find a way to fix that.

[jserv]

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