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Flagfox 6.1.x

Flagfox is hosted on Mozilla’s official addon repository, addons.mozilla.org (AMO). You can always download the latest version of Flagfox from here:

Flagfox information & screenshots
Flagfox downloads & changelog

Flagfox 6.1+ supports Firefox 60+ (ESR). The full browser support history table is available here.

Flagfox 5.2.x

Mozilla ended support for Firefox 52 ESR in September of 2018, at which point Flagfox ended its extended support for Flagfox 5.2.x, the final version written for Mozilla’s old XPCOM/XUL API. The final version of that Flagfox branch, version 5.2.11 began detecting its included IP location database as stale at the end of 2018. Running old browsers (or anything based upon them) is dangerous, as you no longer have access to security and stability updates, thus putting yourself and your data at risk. Running old versions of addons has significantly less risk, though in the case of Flagfox, the old IP location database will result in showing flags for where a server used to be, not necessarily where it actually is today. Ideally, everyone should update to the latest versions and move on.

That said, Mozilla decided to set their entire archive of pre-WebExtension versions of addons on fire; the Mozilla Addons site admins deleted all versions of all addons that used any XPCOM/XUL APIs (including hybrids that used both XPCOM/XUL and WebExtension, to provide user data transitions, e.g. Flagfox 5.2.x). As such, this page is now the last remaining place to actually download this old version, so I’m inclined to leave it available here for the time being.

Flagfox 5.2.x is the primary method to migrate user actions/settings from all old versions of Flagfox to the format needed for Flagfox 6.x (more info). Manual imports are also possible; inquire on the Flagfox forum if this actually comes up as a problem.

The full Flagfox 5.x changelog is available here.

Flagfox 5.2.11 ESR Installation Requirements:
Flagfox 5.2.x ESR requires Firefox 52 ESR, including updates, or a fork based on at least that version, and will not run in later versions of Firefox. Running one of these versions also unfortunately requires disabling of Mozilla’s addon signing requirements, which you can easily do by setting the “xpinstall.signatures.required” preference to false in about:config. Automatic updates are also not available, however upgrading to Firefox 57+ will allow for automatic update to latest Flagfox 6.x+. Hashes are provided below for integrity checking, if desired. As the extended support releases were released after Mozilla shifted to mandatory WebExtension API use, none of the Flagfox 5.2.x ESR versions are codesigned by Mozilla. In case you’re sufficiently paranoid, the final version prior to this extended support period that still got codesigned is also available here, in which case you can leave the signature checking preference set to the default.

Download Flagfox 5.2.11 (final 5.2.x extended support update)
SHA2-256 hash of 5.2.11: 87255649f4b274018407a47d6a151e26867b02194a9dddb35f92a4c5c84a359d
Download Flagfox 5.2.3 (final codesigned 5.2.x update)
SHA2-256 hash of 5.2.3: 3c395b32b74dca0ab4d031b9b4e0c082640a5f4119b4e61b13053166d329c6b9

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