You may have accidentally zoomed webpage(s). Reset the page zoom on pages that cause problems.

• View -> Zoom -> Reset (Ctrl+0/Command+0 (zero))

• https://support.mozilla.org/en-US/kb/font-size-and-zoom-increase-size-of-web-pages

See also:

• https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently

Can we get proof of the issue. I see no issues with large image results selected. see screenshot

I have not zoomed in. Note that I have tested it with a freshly-downloaded, up-to-date and unmodified Firefox Portable.

To see the issue (in my case), you have to click an image (first one in your screenshot is also the first one I am seeing) to open the preview pane. There I have the issue of a low-resolution image. It may even be the same resolution as on the page visible in your screenshot.

I have attached two sample images (low-res=private mode and high-res=nonprivate mode).

If I check the images via "View Image Info" in the right-click context menu then I see small BASE64 encoded data URIs.

You can right-click and select "Inspect" to open the built-in Inspector with this element selected.

• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/open_the_inspector/
• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/examine_and_edit_html/

Hm, I don't follow you. I also don't see a "View Image Info", but I can open that window with CTRL+I and find the images there. There, and in the inspector, I see different URLs:

private mode: img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTPmnVT02H8UmNMYEO7jgOWdYcNFSa6Bfk60A&s" jsaction="VQAsE" class="sFlh5c pT0Scc" alt="United Way of New York City | LinkedIn" jsname="JuXqh" style="max-width: 2048px; height: 100px; margin: 25.5px 0px; width: 235px;" data-ilt="1719724566184"

normal mode: img src="https://media.licdn.com/dms/image/C4D1BAQHHFzHNIN9G7g/company-background_10000/0/1646846202429/united_way_of_new_york_city_cover?e=2147483647&v=beta&t=oL0Izqx43wbZq619ccU_d949amQR4ALGQ80NWuMKLTk" jsaction="VQAsE" class="sFlh5c pT0Scc iPVvYb" style="max-width: 2048px; height: 79px; margin: 0px; width: 185px;" alt="United Way of New York City | LinkedIn" jsname="kn3ccd" aria-hidden="false"

Does that help?

If I check the images via "View Image Info" in the right-click context menu then I see small BASE64 encoded data URIs. You can right-click and select "Inspect" to open the built-in Inspector with this element selected.

• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/open_the_inspector/
• https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/examine_and_edit_html/

Exactly! Look at the image size, it's only 300kb. If you take a pic off of your phone, put it the computer and then use Paint to reduce the image size or quality down to 300kb, you will see the issue. Like cor-el said, just right click any image to see the info about the image. see screenshot

I don't have the "View Image Info" (see attached screenshots). Apart from that, the image sizes are: 9.76 KB, 344×146 (private mode) 528.2 KB, 2048x873 (normal mode) Actually I find it a bit surprising that a sub 10 KB picture still looks that good.

To show "View Image Info" on right-click, you probably need to go into about:config and set browser.menu.showViewImageInfo to true. It's default value is false which makes that menu option go away.

In my normal profile (not in a private window), the image being shown here is the 9.76 KB, 344×146 version with the encrypted URL.

I also got the blurry type image in my clean profile that I use for testing. Turns out, it was Enhanced Tracking Protection doing it. After setting it to Standard from Custom and refreshing the page, I got the larger versions of the images.

Looks like it's blocking the media.licdn.com link as it considers it as a SocialTracker.

Yes, that's it. Disabling "Tracking content" (it was set to "only in private windows") "solves" the issue. But I guess I will then rather keep it enabled. Thanks for the analysis!