The issues with Ebay's appearance are related to Firefox's Enhanced Tracking Protection feature. See [https://support.mozilla.org/en-US/questions/1300993#answer-1343900 my answer] to the [https://support.mozilla.org/en-US/questions/1300993 Firefox unusable on eBay!] thread for more information: <blockquote>It looks like Firefox is blocking files it believes are being used to track you. Unfortunately, it appears that Ebay also has core functionality components mixed into those files. Since Firefox is blocking those files from loading, Ebay will appear broken if your Enhanced Tracking Protection settings are too strict in Firefox. To fix this, go to the Ebay website. You should see a little purple or blue shield icon on the left side of the Firefox address bar, next to the padlock icon. If you click it, press the little toggle switch to turn off Firefox's Enhanced Tracking Protection feature on Ebay. The website should reload automatically and it should be fixed. See [[Enhanced Tracking Protection in Firefox for desktop]] for more information. Hope this helps. </blockquote>