If you are having problems getting through the sign-in process sometimes using a different browser or a different device may help; some browsers seem to be better at this than others. There can also be problems with cookies, add-ons or browser settings, and switching to another browser can be a good way to diagnose problems without having to change your settings, or even to act as a workaround. VPNs, script blockers and custom firewalls can also cause problems signing in or getting through the verification process.
Lately many desktop browser users have experienced issues with ad blockers, and with Enhanced Tracking Protection in Firefox -- disabling those temporarily on ebay.com or using another browser may help if you are having problems with pages not loading properly or functions not working. Refreshing a page while holding down the shift key to bypass the browser cache may also help.
Sometimes when caught in a sign-in loop, clicking on the eBay logo should take you to the main page; if you do not see a "sign-in" link in the upper left, you may be signed in already at that point.
