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I have a specific problem...Firefox will not load a particular web site which it previously did for years. I have refreshed and reinstalled with no solution.

Here is my story (nightmare)... When I try to launch my credit union, Navy Federal, the following appears on my screen.

Access Denied You don't have permission to access "http://signon.navyfederal.org/siteminderagent/forms/nfcu.fcc" on this server. Reference #18.859ec817.1618087497.20456bf6

I can launch other web sites with Firefox AND i can launch Navy Federal with other browsers. On subsequent attempts to launch Navy FCU, I always get the same Access Denied message, however, the Reference # changes. THANK YOU!!

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Hi. tcraw

See this article on how to fix Firefox can't load websites but other browsers can https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

有幫助嗎?

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Also, this message is characteristic of a web application firewall meant to block suspicious connections to the site. That could be caused by accumulated files in the web cache, obsolete cookies the site previously set, or modifications to settings, or by add-ons. Along those lines:

Cache and Cookies: When you have a problem with one particular site, 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.

(2) Remove the site's cookies (save any pending work first). While viewing a page on the site, click the lock icon at the left end of the address bar. After a moment, a "Clear Cookies and Site Data" button should appear at the bottom. Go ahead and click that.

In the dialog that opens, you will see one or more matches to the current address so you can remove the site's cookies individually without affecting other sites.

Then try reloading the page. Does that help?

Double-check content blockers: Firefox's Tracking Protection feature, and extensions that counter ads and tracking, may break websites that embed third party content (meaning, from a secondary server).

(A) The shield icon toward the left end of the address bar usually turns a bit purplish when content is blocked. Click the icon to learn more or make an exception. See: Enhanced Tracking Protection in Firefox for desktop.

(B) Extensions such as Adblock Plus, Blur, Disconnect, DuckDuckGo Privacy Essentials, Ghostery, NoScript, Privacy Badger, uBlock Origin or uMatrix usually provide a toolbar button to manage blocked content in a page. There may or may not be a number on the icon indicating the number of blocked items; you sometimes need to click the button to see what's going on and test whether you need to make an exception for this site.

Testing in Firefox's Safe Mode: In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart. A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.) A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?

有幫助嗎?

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