Open Bug 1519500 Opened 6 years ago Updated 2 years ago

Navigator-toolbox bottom border uses a blob image on macOS

Categories

(Core :: Graphics: WebRender, enhancement, P3)

Product:
Core
Component:
Graphics: WebRender
Platform:
All
macOS
Type:
enhancement

Tracking

()

Tracking Flags:
Tracking Status
firefox66 --- affected

People

(Reporter: mstange, Unassigned)

References

(Blocks 1 open bug)

Details

https://searchfox.org/mozilla-central/rev/7adb490485eff0783071a3e132005bceeb337461/browser/themes/osx/browser.css#52-65 :

On macOS, the browser chrome's bottom border is a box-shadow on an element with -moz-appearance:

#navigator-toolbox::after {
  -moz-appearance: toolbox;
  height: 1px;
  border: none;
  box-shadow: inset 0 -1px var(--chrome-content-separator-color);
}

Gecko currently treats box-shadow on elements with -moz-appearance specially. With WebRender, those shadows fall back to using blob images.
This special behavior is unnecessary in the browser chrome, so we should find a way to make this box-shadow not use fallback.

Priority: -- → P3
Severity: normal → S3
You need to log in before you can comment on or make changes to this bug.