Some possible causes for "You don't have permission..." If you are using a VPN when accessing these sites. If you have customized any preferences that affect browser requests. For example, modifying your user agent or referring header or using an extension/add-on that does. If you have Firefox set to block ALL cookies. Using a proxy server. Changing those settings: Menu -> Settings -> General page -> Network Settings (at the bottom of the page) Click the Settings button, change the top setting to "No Proxy" and then click OK.