In Florida, you cannot download an application online. 

A voter, or someone designated by the voter, may request an absentee ballot from the supervisor of elections in person, by mail or by telephone.

A single request can cover all elections through the next two regularly scheduled general elections. If you would like to have an absentee ballot mailed to you, contact your supervisor of elections by 5 p.m. on the sixth day before an election.  Link on right sidebar.

The person requesting an absentee ballot must disclose:

•   The name of the voter for whom the ballot is requested;
•   The voter’s address;
•   The voter’s date of birth;
•   The requester’s name;
•   The requester’s address;
•   The requester’s driver’s license number, if available;
•   The requester’s relationship to the voter; and,
•   The requester’s signature (written request only).