As the number of downloads increases, chromium starts behaving badly

[Admini]

I just thought that if the icon is now a vector in a text file, and not in png, then its change can be added to the browser settings. Or is it not possible?

Providing an option is possible, but it's not worth it because the feature is so tiny.
Chromium uses its own .icon format for toolbar buttons, maybe you can locate the corresponding file by searching through the contents of these extracted files.