Part of mozilla.org·Mixed·190 tested URLs→
Can you open https://www.mozilla.org/en-US/thunderbird from mainland China?
Yes.
All 1 recent conclusive tests connected normally.
2016first tested
0/1disrupted · last 90 days
1 mo agolast tested
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Other tested URLs on mozilla.org
Blocking varies across mozilla.org: 15 blocked vs 77 accessible among tested hosts.
http://mozilla.orgIntermittenthttps://mozilla.orgIntermittenthttp://mozilla.org/zh-TWIntermittentftp://ftp.mozilla.orgNot enough datahttp://www.mozilla.orgBlockedhttps://hg.mozilla.orgas of 2026Not blockedhttp://ftp.mozilla.orgNot blockedhttp://vpn.mozilla.orgBlockedhttps://www.mozilla.orgIntermittenthttps://ftp.mozilla.orgIntermittenthttps://air.mozilla.orgIntermittenthttps://vpn.mozilla.orgIntermittenthttp://blog.mozilla.orgBlockedhttp://hacks.mozilla.orgIntermittenthttps://blog.mozilla.orgIntermittenthttps://wiki.mozilla.orgNot blockedhttps://chat.mozilla.orgNot blockedhttp://addons.mozilla.orgIntermittenthttp://www.mozilla.org/esBlockedhttps://paste.mozilla.orgUnresolvablehttps://hacks.mozilla.orgIntermittenthttps://addons.mozilla.orgIntermittenthttp://support.mozilla.orgNot blockedhttp://archive.mozilla.orgas of 2026Not blockedhttps://www.mozilla.org/jaas of 2026Not blockedhttp://bugzilla.mozilla.orgIntermittenthttp://download.mozilla.orgBlockedhttp://etherpad.mozilla.orgUnresolvablehttps://support.mozilla.orgas of 2026Not blockedhttp://pastebin.mozilla.orgUnresolvablehttps://archive.mozilla.orgIntermittenthttps://www.mozilla.org/ru/Not blockedhttp://www.mozilla.org/en-USNot blockedhttps://download.mozilla.orgNot blockedhttps://etherpad.mozilla.orgUnresolvablehttp://developer.mozilla.orgNot blockedhttps://bugzilla.mozilla.orgNot blockedhttps://packages.mozilla.orgNot blockedhttps://www.mozilla.org/en-USNot blockedhttps://www.mozilla.org/zh-CNBlockedhttps://discourse.mozilla.orgas of 2026Not blockedhttps://developer.mozilla.orgNot blockedhttps://www.mozilla.org/aboutas of 2026Not blockedhttps://ssl-config.mozilla.orgIntermittenthttp://www.mozilla.org/firefoxIntermittenthttps://foundation.mozilla.orgBlockedhttps://blog.mozilla.org/latestNot blockedhttps://commonvoice.mozilla.orgNot blockedhttps://addons.mozilla.org/zh-CNNot blockedhttps://blog.nightly.mozilla.orgNot blockedhttps://developer.mozilla.org/zh-CNNot blockedhttps://www.mozilla.org/en-US/firefoxIntermittenthttps://addons.mozilla.org/ja/androidNot blockedhttps://commonvoice.mozilla.org/zh-CNNot blockedhttps://www.mozilla.org/fr/firefox/newas of 2026Not blockedhttps://learning.mozilla.org/codemoji/Unresolvablehttps://www.mozilla.org/it/firefox/newIntermittenthttps://addons.mozilla.org/ja/android/Intermittenthttps://www.mozilla.org/zh-CN/firefox/Intermittenthttps://www.mozilla.org/ko/firefox/newIntermittenthttps://www.mozilla.org/en-US/firefox/Intermittenthttp://www.mozilla.org/en-US/firefox/fxBlockedhttps://ftp.mozilla.org/pub/mozilla.orgas of 2026Not blockedhttps://firefox-source-docs.mozilla.orgIntermittenthttps://addons.mozilla.org/zh-CN/firefoxNot blockedhttp://www.mozilla.org/en-US/firefox/newBlockedhttps://input.mozilla.org/zh-CN/feedbackIntermittenthttps://addons.mozilla.org/en-US/firefoxIntermittenthttps://www.mozilla.org/zh-CN/firefox/newIntermittenthttps://www.mozilla.org/en-US/firefox/newIntermittenthttps://www.mozilla.org/en-US/firefox/allIntermittenthttps://www.mozilla.org/zh-CN/firefox/allIntermittenthttps://www.mozilla.org/es-CL/firefox/newIntermittenthttps://www.mozilla.org/en-US/exp/firefoxIntermittenthttp://www.mozilla.org/en-US/products/vpnBlockedhttp://www.mozilla.org/zh-CN/products/vpnIntermittenthttps://www.mozilla.org/zh-CN/firefox/all/Intermittenthttps://www.mozilla.org/en-US/products/vpnNot blockedhttps://www.mozilla.org/zh-CN/products/vpnIntermittentEach verdict covers the last 90 days of tests, as on that URL's own page.
Frequently asked questions
Is https://www.mozilla.org/en-US/thunderbird blocked in mainland China right now?
As of the last test on 2026-08-20, https://www.mozilla.org/en-US/thunderbird is not blocked in mainland China, based on GreatFire's live Great Firewall measurements.
https://www.mozilla.org/en-US/thunderbird · JSON