Many site issues can be caused by corrupt cookies or cache.

• Clear the Cache and
• Remove Cookies

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Cookies; Delete cookies to remove the information websites have stored on your computer {web link}

• Cache; How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

Well,starting in safe mode seems to cure the problem,but I also tried shutting down my add-ons one by one before before posting my question here,and that didn't help. Hardware acceleration was turned off when I checked. What would the next step be? Thanks for your prompt response!

One issue that seems more common lately is Firefox's Tracking Protection feature. When it is blocking content in a page, a shield icon will appear at the left end of the address bar next to the padlock icon. This article has more info on managing this feature: Tracking Protection {web link}

I changed the tracking protection to "never",and the problem seems to be gone. Of course,time will tell. Thanks for your suggestions!

Keep us posted.

I had this same issue when accessing certain sites. The steps I performed were. These were unsuccessful: 1. Start FF in Normal Mode. 2. Clear Cache 3. Delete cookies for site in question 4. Disable extensions one by one 5. Disable Hardware Acceleration Non of the above resolved the issue.

This does work: 1. Start FF in Safe Mode Or 2. Start FF in Normal Mode 3. Re-enable Hardware Acceleration & all necessary Extensions. 3. Disable Tracking Protection completely or disable just for the site with issue.

In conclusion it does seem that disabling Tracking Protection either complete or for the site with the issue does resolve the problem I set it to Always protect & disabled it for the site with the issue.

I have had this issue with other sites, now that I know how to resolve it I will disable TP on those sites. But this needs to be corrected.

I eventually learned to turn off tracking protection as the only solution that worked. My local paper gave me the gears about using ad blocking software. I cured the problem by turning off Tracking Protection. Thanks to all for helping me with this issue.

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.