Unable to determine how to disable image scaling; images are scaled to fit into window size so I am unable to see full size images.
Images are scaled to fit into window size so I am unable to see full size images. I assume the setting is there somewhere, but I cannot find it. This is not a problem with zoom, which appears to be working as expected. I noticed it when trying to view an example of a chiaroscuro drawing on Wikipedia; the "view full size image" wasn't much bigger, and resizing the window scaled the image up or down.
Alle svar (1)
You can look at the Boolean pref browser.enable_automatic_image_resizing on the about:config page.
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.
You can use the Filter bar at to top of the about:config page to locate a pref more easily.