the current ones look nearly identical and are hard to distinguish. please consider something different here. e.g. a full speaker (on) versus an outline speaker (off) icon.
These new icons: - Look bad. The outline is too thin, leaving it looking "pixelated" and crusty, as anti-aliasing doesn't have enough meat to work with - terrible for anybody with less than perfect vision. I'm the recommended arms length away from my monitors and I have a legitimately hard time distinguishing muted and unmuted. Somebody with astigmatism, diabetes, you name it probably won't be able to tell the difference at all.
Also the "start playback"* button in tab (when automatic playback is disabled) before was easily distinguishable from mute/unmute, as it had circle around it, while the mute buttons didn't. Now, when everything has a circular outline it's harder to spot at a glance which of many YT pages is playing, and which ones can still be started without switching to the tab. I sometimes open several videos with middle-click, so one is playing, with speaker icon, rest are to be played with the other icon. Now it's hard to see which are which, as everything has a circle with something in it as the icon.
I completely agree that having a visual distinction between "Mute Tab" and "Unmute Tab" would significantly enhance the user experience. It can sometimes be confusing, especially when managing multiple tabs with audio playing in the background.
In fact, a similar idea is implemented in some restaurant ordering systems where clear visual indicators show the status of orders—whether they’re being prepared, ready, or served. For instance, Burger King Menu highlights menu categories and combo deals in a clear and organized manner, making it easy for users to navigate and choose options quickly.
Applying this kind of design thinking to browser tabs could make them more intuitive and user-friendly, especially for multitaskers.