extensions have the option of working only on a set of domain. So you could only install gmail extensions that work only on gmail.com and not on * as 99.999% of

extensions have the option of working only on a set of domain. So you could only install gmail extensions that work only on gmail.com and not on * as 99.999% of the extensions does. Most need to, like referrer blockers and user agent spoofers. But we only need those global extensions because google actively removes those functionalities from chromium, on a regular basis, after someone in the community adds it. over and over again.