IT Home news on March 21, according to a number of IT Home netizens contributed, using Chinese mainland IP to access the Firefox extension store, some ad blocking extensions show that can not be used, such as uBlock Origin, AdGuard AdBlocker, AdBlock For Firefox, AdNauseam.
As shown in the image above, when the user enters the detail page of the above 4 extensions, it will display "This page is not available in your region", and the official does not give the reason why it cannot be used.
The inspection tool shows that the status code returned by the request is 451 and the response content says "Not available for legal reasons."
IT Home learned that as early as 2017, Mozilla's wholly-owned subsidiary in China, "Beijing Mozhi Firefox Information Technology Co., Ltd.", was sued by a number of domestic companies for advertising blocking.
However, at present, only the above 4 ad-blocking extensions are not available in the test, and users can choose to install other extensions for ad-blocking, or they can directly download the extension's files and install them locally.