Method to invite all contacts to event or to like a page. (All browsers).

1. Click Invite Friends on whatever you are inviting people to
2. In the dropdown next to the search box, click Search All Friends
3. Scroll ALL the way down until names stop loading (I found it easy to click the first name and then hold down the spacebar or Page Down button)
4. For EVENTS :
Drag this to bookmarks

For PAGES :
Drag this to bookmarks