When using an IP in China Mainland to access some AD blocker extensions pages of Firefox addons (https://addons.mozilla.org/), such as uBlock Origin, AdGuard AdBlocker, AdBlock For Firefox, and AdNauseam, the website prompts “That page is not available in your region”. I don’t know why Chinese users can’t access them, but I know it defeats the mission of mozilla : Keep the internet open and accessible to ALL. I hope Mozilla can “build a better Internet” as it promised.
This restriction appears to have been added recently. Can mozilla provide some relevant information?
Preloading or providing ad-blocking add-ons inside browsers is a violation to Anti-Unfair Competition Law of People’s Republic of China.
It is noticed that Mozilla itself and its Chinese partner, Beijing Mozilla Firefox Information Technology Ltd., which runs Firefox in China Mainland, has been under multiple similar law suits since 2017, from MGTV (（2018）京73民终433号), Ku6.com (（2018）京73民终397号) and Youku.com (no court report, see （2018）京73民辖终364号, lawsuit ended through mediation agreement ) due to providing and advertising uBlock Origin (or similar add-ons) inside the Firefox, though no public evidence shown that the return of HTTP 451 is related to these lawsuits.
This is awful.
I implore Mozilla to reconsider its strategy in China.
so, how can i install uorigin again?
You can go to GitHub (https://github.com/gorhill/uBlock) and download the xpi file. But I guess if you can access to GitHub without being banned by GFW, you can also visit addons.mozilla.org to install it.