The 1st paragraph of the chapter has no indent in fb2 file

[GCRaistlin]

<title>
<p>CHAPTER 1</p>
</title>
<p>This is the 1st paragraph.</p>
<p>This is the 2nd paragraph.</p>

looks like this:

[GitHubRulesOK]

version your using (only pre-release can be "fixed") sample of file/page for wider testing in context?

[GCRaistlin]

The issue is still present in build 15313. Sample: Harrison, Harry - Captive Universe - 1969.fb2.zip

[avorobey]

This isn't a bug, it's a conscious decision on part of MuPDF developers. This line specifies that indentation will apply to all paragraphs but the first. If it's changed to "p" from "p+p" at the beginning, the first paragraph will be indented, too.

Calibre shows all paragraphs indented. Apparently it is a contentious issue whether the first paragraph should be indented. If you feel strongly that it should, might be a good idea to make your case to MuPDF developers.

[GCRaistlin]

How does MuPDF concern SumatraPDF?

[avorobey]

@GCRaistlin MuPDF is the open-source library SumatraPDF uses for parsing and rendering some (but not all) of the formats it supports, in particular PDF and FB2.