Load the web page. Then, to reload the page bypassing the cache and force a fresh retrieval; Ctrl+Shift+R (Mac=Command+Shift+R)

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). Is the problem still there?

The safe mode suggestion works.. it loads the other images but it means every time i visit a wiki.com fandom site... i have to restart FireFox Quantum.. :( :(

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Go to that message, and use the Undo link to its right.

It could be the work of one of your add-ons, or it could be Hardware Acceleration. How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is, detective.

I found the add-on that was blocking images being shown..

it was : IOBIT Surfing protection and Ads Removal .. it is part of the IOBIT Program - IOBIT Malware Fighter.. - Browers Protection section

I found in the settings for this section where 1 could allow ads to be display on a site name .. in this case it was 2.. Wiki.com & Wikia.com

Thank you kindly for the quick responses to my problem..