the Canadian government REQUIRES you to use Adobe reader to sign PDFs in order to immigrate to canada
This took a few frustrated attempts to discover for me. Moved to Canada last year and while I am a citizen my wife and kids are not. There was a lot of paperwork to fill out and submit and having repeated issues with documents not opening and seeming not to exist was crazy making. I dont normally install Adobe anything on my computers but decided it was worth a try...
Bright side of the story is that after less than a year the family is now all legal and have their PR cards. The Canadian gov can be refreshingly efficient sometimes.
Bring back Google+ !