no-large-media click-to-load never working for video/audio on Firefox

[Rudxain]

I can click to download image elements, but it never works for audio/video elements on every domain I've tried.

Interestingly, a few days ago, it did work for a Discord video on Firefox-for-Android, which is completely unexpected (but nice) considering that click-to-load doesn't even work for images on Discord (in desktop and mobile modes) because they have a heavily-customized DOM.

I'm about to try to repro on a clean profile, but I expect the results will be the same, considering this has been happening for months (years?) on many devices

[stephenhawk8054]

We need exact URLs and steps to reproduce easily (not discord).

[Rudxain]

0. Install uBO on Firefox 140
1. Block large media larger than 1KB (default switch in settings)
2. Go-to https://en.wikipedia.org/wiki/Arpeggio or https://en.wikipedia.org/wiki/Video
3. The examples cannot play, no matter where I click

Alternatively, disable JS and reload that wiki page (this ensures the audio/video elements are "vanilla"), they cannot play this way either. The browser shows "No video with supported format and MIME type found"

[stephenhawk8054]

@gorhill Looks like it's because the audio elements originally doesn't have any sources, and the media only appears when clicking on the play buttons, hence they are blocked again?

[gorhill]

Yes, it looks like the is the reason. It's a long time ago, but I think this was put in place because of sites which use blob: URL to feed a player -- these cannot be filtered through the normal network request filtering. Maybe I could skip the behavior when the URL is an HTTP-based URL.

[freezer2022]

Rudxain keep in mind this one as well, as on different websites you visit, a different issue might be the cause:

• Unable to play app trailers on Steam with no-large-media  #3325

[Rudxain]

While #3325 is related, Steam doesn't use the browser default player, I'm having issues with all kinds of players (except streaming/packet players such as YouTube)