Enable extension for all domains

[sergiubologa]

Hi there, nice job on this extension. 🍾

Although, I think would be very useful to enable the extension for all domains, not only for npmjs and github. This way users would be able to search for other packages without opening the bundlephobia website in another tab.

Of course, for certain domains (npmjs, github, etc) the current functionality should be the same (add the package name in the search box automatically).