Mario, If you navigate to the Adblock Plus Main Web Page, http://adblockplus.org, from within the web browser you wish to install it for, it puts what looks like a button (but may be a link) right there on the page to install it. In the case of Internet Explorer the text reads "Install for Internet Explorer" (I just tested that out).
It's clear that they're still using a workaround for IE and, particularly, for MS-Edge since Edge does not yet support Add-Ons via its own manager. Brian
