User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:79.0) Gecko/20100101 Firefox/79.0

Steps to reproduce:

1. Enable WebRender and backdrop-filter in about:config and restart Firefox
2. Visit https://developer.mozilla.org/en-US/docs/Web/CSS/backdrop-filter#frame_Examples
3. Take a screenshot of the example with Firefox's built in screenshot function.

Actual results:

The screenshot didn't capture the blur backdrop-filter effect.

Expected results:

The screenshot should capture the blur backdrop-filter effect.

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

I think the screenshots code still uses the old (non-webrender) codepath, which would explain this.

Barret, I recall you working on WR screenshots. Do you have an idea on why FF isn't using this?

The stuff I was working on (profiler screenshots / composition recording) uses a different mechanism than the regular screenshot button. Sorry, not sure I can help in that case.

For what it's worth, I just tested this in Nightly 2022-06-08 and can confirm that this is still an issue. Also the :screenshot command within the DevTools Webconsole is affected by that, so I assume that's using the same code as the screenshot tool.

Sebastian

In FF 110 this issue is still valid, at least for the screenshot button.

There is also a newer ticket (https://bugzilla.mozilla.org/show_bug.cgi?id=1801637) which seems to be a duplicate of this one.

I'm glat that issue is not new but maybe solution is on the way?