add-ons no work more

's Avatar


24 Jan, 2018 11:21 AM

After upgrading, extensions (add-ons) does not work anymore. No "explore add-ons" in the add-ons page, adblock doesn't work. A very big problem. My machine is a PowerMac Quicksilver with leopard running. Thank you.

  1. Support Staff 1 Posted by Cameron Kaiser on 24 Jan, 2018 02:28 PM

    Cameron Kaiser's Avatar

    The "Explore Add-Ons" tab was removed because the new extensions require WebExtensions, which we don't support (that tab comes from Mozilla and we don't control it). If you are trying to install an adblocker, you'll need to use an older version that is compatible with TenFourFox (Firefox 45 and below). You can get these from going to, searching for an add-on, and then on the addon page, clicking "See all versions." Any of the ones with a green button are compatible. For example, here are older versions for Bluhell Firewall:

    Alternatively, if you have downloaded an .xpi from another source, you can just drop it on any open TenFourFox window and it will be installed.

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