If you get an error that says: This page isn't redirecting properly

If you're getting a "the page isn't redirecting properly" and Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

This is due to a corrupted cookie in your browser.

You should: Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

Or "Remove Cookies" from sites causing problems:

Tools > Options > Privacy > Cookies: "Show Cookies"

Alternatively, use a different browser like Chrome. (which is much faster and generally more compatible in our opinion!)

For more information, take a look at: https://support.mozilla.org/en-US/questions/938531