File Guard (Encryptor | Decryptor) is an add-on for all popular browsers. You can add it to the browser of your choice without the need to make any changes to your browser or to your OS.

This add-on works with all your files and supports the latest versions of the most popular browsers. It is a simple and easy-to-use UI, and all you need to do is to add the addon and start using it without any additional plugins.

All you need to do is to choose the desired file, add the required password (the addon has a built-in password manager), press the - Encrypt - button, and wait for the file to be downloaded.