The page is in the members only area of the website. With my level of knowledge I do not know how to provide a url for pages that everyone can see without giving everyone a password to the members pages. That is why I provided images of what a member can see. If there is a way to do this please let me know. The site uses WordPress and the plug-in Dflip to present .pdf files in a page turning viewer. I register the pdfs with the plug-in and assign each a 'category' which is a combination of the content type and the year published. The plug-in provides a 'slug' (user friendly URL) to present the files of that category which is then included in the page definition. To my limited understanding this appears to be a FF issue, in that when the page is presented, the Wordpress presentation block that contains the URL slug appears blank, but if one were to select an area where the thumbnail should be shown, it opens that pdf file. When using other Windows browsers, the thumbnails are shown. And this worked correctly until FF release 118.0.

There is a new release of Wordpress available 10/13/23, but I hesitate to move further into the release schedule until this is resolved.

Thanks to everyone that is taking a look at this, and I will provide any other information that I can.

DanC

Additional info: Pages using the plug-in and a single pdf file (rather than a category with multiple files) are presented correctly in all browsers. The really confusing part is that if I use mouse right click, save, as .htm, and then open that file from local storage, the presentation shows the borders of the thumbnail images, but the text is enlarged and is truncated where it expands beyond the thumbnail image. (See file three of the attached images)

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

• hold down the Shift key and left-click the Reload button
• press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• press "Command + Shift + R" (Mac)

You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsafe content.

• https://firefox-source-docs.mozilla.org/devtools-user/web_console/

You can check the Network Monitor to see if content is blocked or otherwise fails to load.

• https://firefox-source-docs.mozilla.org/devtools-user/network_monitor/

If necessary use "Ctrl+F5" or "Ctrl+Shift+R" (Mac: Command+Shift+R) to reload the page and bypass the cache to generate a fresh log.

Does it still happen in Troubleshoot Mode?