hmm, that's not really a regression by design (to enable incomplete file loading both disableStream=true and disableAutoFetch=true must be set), since enabling stream shall automatically disableAutoFetch. we have a confusion here with the options and this PR might be an acceptable solution. however it's better to see something like enumeration autoFetch=[disabled|stream|range|auto]:

• disable: disableAutoFetch=true, disableStream=true;
• stream: disableAutoFetch=true, disableStream=false;
• range: disableAutoFetch=false, disableStream=true;
• auto: disableAutoFetch=false, disableStream=false; (if stream is not available, falls to auto-fetch)

Just thinking: if we let disableAutoFetch to disable stream, there is really no need in disableStream

hmm, that's not really a regression by design (to enable incomplete file loading both disableStream=true and disableAutoFetch=true must be set),

A valid point, that I completely overlooked, sorry about that!
This works well in the addon given the code in PdfStreamConverter.jsm, but not in the generic viewer (where it is a regression, in my opinion).
@yurydelendik Any objection against me re-purposing this PR to just fix the generic viewer, and then we can explore your enumeration idea in a followup if we want to?

I see. Yeah we need to fix "disableStream=true and disableAutoFetch=true" thing for the generic viewer

/botio-windows preview

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Published

• Viewer: http://107.22.172.223:8877/b2fd88de096a903/web/viewer.html
• B2G Viewer: http://107.22.172.223:8877/b2fd88de096a903/extensions/b2g/content/web/viewer.html
• Extension: http://107.22.172.223:8877/b2fd88de096a903/extensions/firefox/pdf.js.xpi
• Extension (AMO): http://107.22.172.223:8877/b2fd88de096a903/extensions/firefox/pdf.js.amo.xpi