
In Safari 9 before,We just download a safariextz file and double click on it,So that Safari can load this plugin。The benefit is definitely very convenient,But it ’s also not very secure (plugins that can be downloaded everywhere,It is likely to have been tampered with)。
So later,Apple no longer allows users to directly download plug-ins to install on Safari,App must be downloaded from Mac Apple Store,Then the Safari plugin is provided in the form of a plugin in the app,With App[……]