@cits
Do you have the same problem if you do that search in a private browser window after signing in to your account?
If you do not see any display issues with that search when using a private browser window, that might point to an issue with your browser cache and eBay cookies. If you have previously deleted all your cookies at once, try deleting eBay cookies manually -- sometimes a cookie can get stuck or blocked; in that case, deleting all cookies may not erase the problem cookie.
You might also want to try disabling add-ons; it is possible that an ad block rule can cause format issues -- try disabling your ad blocker on that page to see if that matters at all.
If you still have formatting problems using a private browser window, that might indicate a problem with your Firefox installation. It might be worth trying a new install of Firefox -- or else installing an alternative version such as Firefox Developer's Edition if you do not want to entirely redo Firefox yet. The Developer's edition will install in parallel with your current version without affecting the current version, but can import all of your bookmarks and settings if you want.
https://www.mozilla.org/en-US/firefox/developer/
