Revert "js: Punt installing the plugin until the DOM has loaded"
Revert "js: Punt installing the plugin until the DOM has loaded"

This reverts commit cea22f06865fa9fc881ca1aa5bbcf8dbe0ba2ab1.

GNOME/extensions-web,magcius/sweettooth,magcius/sweettooth,GNOME/extensions-web,GNOME/extensions-web,GNOME/extensions-web