UIR Header Comments

 Encrypted Web (or HTTPS Everywhere) uses a list of rules to determine if a website supports HTTPS and redirects your browser to the secure version of the page, if it exists. UIR Header tells the website you're visiting that you want the secure version and lets the site you're visiting choose how to respond.

 For an explanation of what Upgrade-Insecure-Requests does, check out <https://stackoverflow.com/questions/31950470/what-is-the-upgrade-insecure-requests-http-header>. For an example, try out this website. Without this Add-on, visiting <http://realityripple.com> will remain insecure in Pale Moon. If you enable this add-on, however, you'll automatically be redirected to <https://realityripple.com>. It's basically a method of telling websites you want the secure version, if possible.