It redirects for me. There is a warning triangle on the lock symbol due to mixed content.

When you have a problem with one particular site, particularly one you have updated recently, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.

(1) Clear Firefox's Cache

See: How to clear the Firefox cache

If you have a large hard drive, this might take a few minutes. If you do not see the number going down on the page, you can reload it using Ctrl+r to check progress.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either:

• right-click (on Mac Ctrl+click) a blank area of the page and choose View Page Info > Security > "View Cookies"
• (menu bar) Tools > Page Info > Security > "View Cookies"
• click the padlock or "i" icon in the address bar, then the ">" button, then More Information, and finally the "View Cookies" button

In the dialog that opens, the current site should be pre-filled in the search box at the top of the dialog so you can remove that site's cookies individually.

Then try reloading the page. Does that help?

Also, in case this is caused by the redirect block, please turn that off, as it seems to cause more problems than it solves.

You can do that here:

"3-bar" menu button (or Tools menu) > Options

In the left column, click Advanced. On the right side, with the "General" mini-tab active, uncheck the box for "Warn me when websites try to redirect or reload the page" if it is checked.

(This is an accessibility feature intended for users of screen reading software and not a general-purpose tool of value to most users.)

Thanks you the response, i did both thing as you said and it worked. Thank you so much...