Can you open http://addons.mozilla.org/firefox/addon/foxyproxy-standard from mainland China?
No.
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
Frequently asked questions
Is http://addons.mozilla.org/firefox/addon/foxyproxy-standard blocked in mainland China right now?
As of the last test on 2026-08-18, http://addons.mozilla.org/firefox/addon/foxyproxy-standard is 100% blocked in mainland China, based on GreatFire's live Great Firewall measurements.
Why is http://addons.mozilla.org/firefox/addon/foxyproxy-standard blocked in mainland China?
It's blocked — 100% of the last 1 conclusive tests failed in mainland China.
Since when has http://addons.mozilla.org/firefox/addon/foxyproxy-standard been blocked?
GreatFire has recorded interference with http://addons.mozilla.org/firefox/addon/foxyproxy-standard from mainland China since 2014-10-02.
How can I access http://addons.mozilla.org/firefox/addon/foxyproxy-standard from mainland China?
You need a circumvention tool such as a VPN. GreatFireVPN, built by GreatFire, is designed to bypass the Great Firewall and reach sites like addons.mozilla.org.
http://addons.mozilla.org/firefox/addon/foxyproxy-standard · JSON