Tabs without favicon should display a placeholder icon

[toasty]

Some websites do not serve a favicon, or Firefox seems to not pull one (not sure which). Regardless, when without a favicon, Firefox should use a placeholder icon to keep tab bar consistency. When a tab doesn't have a favicon, it makes it a bit more difficult to find when searching along the tab bar, and makes it more difficult to delineate where the tabs are separated. Since Firefox already has a "globe" icon used in the bookmarks manager, I would think it would be easy to use that to indicate a webpage. AFAIK, Firefox is the only browser that doesn't do this.

I have attached a screenshot showing how it looks next to a tab with a favicon.

Thanks for reading!

Screenshot 2023-06-19 at 10.58.21 AM.png

[Jon]

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[c6897]

I want this so bad. favicons are pretty much the only way to distinguish between inactive tabs. When a tab doesn't have one it drives me crazy.