1793124 - Firefox 105.0.1 (Windows) does not recognize backdrop-filter as valid CSS property with software webrender

Status: RESOLVED INCOMPLETE

(Core :: Graphics: WebRender, defect)

Description

[jwalker083]

Attachment: Screenshot 2022-09-30 153600.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Steps to reproduce:

loaded page with CSS containing "backdrop-filter: blur(0.25rem)"
also contains "-webkit-backdrop-filter: blur(0.25rem)"

Actual results:

blur effect did not work, and the inspector shows warning: "Invalid Property Name" next to both properties. Compatibility tab shows issue that it should be prefixed.

Expected results:

backdrop-filter should be compatible since 103, and should work or at the very least not be interpreted as an invalid property.

Comment 1

[David Shin[:dshin]]

This is weird. I launched an MDN page with this property but everything seems to be in order.
103 from mozregression seems to work fine too: mozregression --launch 103 -a https://developer.mozilla.org/en-US/docs/Web/CSS/backdrop-filter

:jwalker083, can you still reproduce this? Is it possible for you to disclose the page? Potentially, try from a fresh profile launched through about:profiles?

Comment 2

[Emilio Cobos Álvarez [:emilio]]

Bug 1785366 blocked backdrop-filter in some GPUs, that might be what you're seeing, perhaps.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

jwalker083 can you attach your about:support?

Comment 4

[jwalker083]

Attachment: about_support

Comment 5

[Jeff Muizelaar [:jrmuizel]]

It looks like software webrender is being used and not the blocked hardware.

Comment 6

[jwalker083]

I'm still having the issue after checking again. On the linked MDN page, the example wouldn't load either. I'll see if I can share the page.

Comment 7

[Emilio Cobos Álvarez [:emilio]]

about:support says:

        {
          "name": "BACKDROP_FILTER",
          "description": "Backdrop filter",
          "status": "blocklisted",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "env",
              "status": "blocklisted",
              "message": "#BLOCKLIST_FEATURE_FAILURE_PARSE_DRIVER"
            }
          ]
        }

Comment 8

[Alexandru Trif, Desktop Test Engineering [:atrif]]

I have also tried on two different Windows 10x64 machines with Firefox 105.0.3 while having gfx.webrender.software:true and the CSS backdrop filter from https://developer.mozilla.org/en-US/docs/Web/CSS/backdrop-filter is displayed as expected. If more investigation is needed please let me know. Thank you!

Comment 9

[Kelsey Gilbert [:jgilbert]]

Maybe it's failing because of this:

"adapterDescription": "Parallels Display Adapter (WDDM)",

We should probably not care about that for SWWR though.

Comment 10

[Glenn Watson [:gw]]

Looks like driverVersion is an empty string. I guess that makes ParseDriverVersion fail, since that's the only place that returns FEATURE_FAILURE_PARSE_DRIVER from what I can see.

Perhaps we shouldn't try parse driver version if sw-wr is enabled?

Comment 11

[BugBot [:suhaib / :marco]]

A needinfo is requested from the reporter, however, the reporter is inactive on Bugzilla. Closing the bug as incomplete.

For more information, please visit BugBot documentation.