There are many possible reasons a site might ''think'' you are using an ad blocker. You could start your investigation here: (1) Built-in Tracking Protection feature (especially in private windows). Do you see a shield icon toward the left end of the toolbar when this problem hits? More info on how to use the shield to manage blocking: [[Tracking Protection]]. (2) Content blocking extension such as Adblock Plus, Blur, Disconnect, Ghostery, NoScript, Privacy Badger, uBlock Origin or uMatrix. Some of these provide toolbar buttons to manage blocked content in a page. You can view, disable, and often configure or remove extensions on the Add-ons page. Either: * Ctrl+Shift+a (Mac: Command+Shift+a) * "3-bar" menu button (or Tools menu) > Add-ons * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. Then cast a critical eye over the list on the right side. Any extensions that Firefox installs on its own are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything that could be blocking content from other sites ("third party" content)? If in doubt, disable. Any improvement?