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Common auto parts site freezes when opened.

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I do mechanical work and frequent numerous part source sites. In the past month, 2 common national sites (AutoZone and Advance Auto Parts) will open to their normal opening site with numerous options to click on such as what part do you need...what specials are, etc. That opening site is "frozen" and will not accept searches or ANY navigation on site. You cannot even close (X) the site...and I must shut down the desktop to escape. I called both national sites and they had no clue what I was talking about. I tried a different search engine (Google not Duck Go) but still after initially opening these 2 sites...they remain frozen. I then downloaded Google Chrome...and that fixed the problem. Both AutoZone and Advance Auto Parts now open... and function normally. Back on FireFox I tried opening the NAPA Auto Parts (who I rarely use) and their site opens and functions normally. My question: Why is Autozone and Advance Auto Parts not usable with Firefox for me ? I navigate hundreds of sites and forums a week with Firefox without problem. I have been using Firefox and visiting those 2 parts sites for Years with FireFox... and no problem. I reloaded newest version of Firefox ...and that didn't fix the problem. Any ideas ? Thanks, Ken

I do mechanical work and frequent numerous part source sites. In the past month, 2 common national sites (AutoZone and Advance Auto Parts) will open to their normal opening site with numerous options to click on such as what part do you need...what specials are, etc. That opening site is "frozen" and will not accept searches or ANY navigation on site. You cannot even close (X) the site...and I must shut down the desktop to escape. I called both national sites and they had no clue what I was talking about. I tried a different search engine (Google not Duck Go) but still after initially opening these 2 sites...they remain frozen. I then downloaded Google Chrome...and that fixed the problem. Both AutoZone and Advance Auto Parts now open... and function normally. Back on FireFox I tried opening the NAPA Auto Parts (who I rarely use) and their site opens and functions normally. My question: Why is Autozone and Advance Auto Parts not usable with Firefox for me ? I navigate hundreds of sites and forums a week with Firefox without problem. I have been using Firefox and visiting those 2 parts sites for Years with FireFox... and no problem. I reloaded newest version of Firefox ...and that didn't fix the problem. Any ideas ? Thanks, Ken

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Hi Ken, it's difficult to say why those sites aren't working in your Firefox.

These are standard suggestions to try when it stops working normally:

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.

Cache and Cookies: When you have a problem with one particular site that worked earlier, 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 (only select Cached web content, don't clear all cookies and site data)

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. Firefox will ask you to confirm; go ahead and confirm.

Then try reloading the page. Does that help?

Testing in Firefox's Troubleshoot Mode: In this mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is running:

You can restart Firefox in Troubleshoot Mode using either:

  • "3-bar" menu button > Help > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)
  • (menu bar) Help menu > Troubleshoot Mode... (before Fx88: Restart with Add-ons Disabled)

and OK the restart. A small dialog should appear. Click the Open button (before Fx88: "Start in Safe Mode" button).

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 the Open button (before Fx88: "Start in Safe Mode" button).

Note: Don't use the Refresh without first reviewing this article to understand what will be deleted: Refresh Firefox - reset add-ons and settings.

Any improvement?