my safari browser won't show picture on certain web sites

Go step by step and test.

1. Update Safari, if an update is available. Update may come with bug fixes.

Update to the latest version of Safari - Apple Support

Update macOS on Mac - Apple Support

2. Force Quit Safari, launch Safari holding the Shift key down.

About pop-up ads and windows in Safari - Apple Support

3. Startup in Safe Mode.

https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.

Quote:

It also does a basic check of your startup disk, similar to using First Aid in Disk Utility.

And it deletes some system caches, including font caches and

the kernel cache, which are automatically created again as needed.

4. Clear History

Clear your browsing history in Safari on Mac - Apple Support

Please read the article before clearing history,

this is like a low level resetting of Safari without affecting passwords and bookmarks.

5. If Safari doesn't open a webpage or isn’t working as expected

If Safari on Mac doesn't open a webpage or isn’t working as expected - Apple Support

6 Click "Develop" in the Safari menubar.

Make sure "Disable Images" is not selected.