Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Dalšne informacije
Toś ta nitka jo se archiwěrowała. Pšosym stajśo nowe pšašanje, joli trjebaśo pomoc.
Rozwězany Archiwěrowany

Why have my addons become legacy addons and cannot be used?

Firefox Druge
Paul jo wótgronił pśed pśed 7 lětami
w00tnoway
w00tnoway

they worked perfectly fine and the next day they didnt, please help me fix this! D: im using firefox 66.0.3 (64 bit)

the addons that stopped working are adblock plus, ghostery, dark mode, and another adblock

they worked perfectly fine and the next day they didnt, please help me fix this! D: im using firefox 66.0.3 (64 bit) the addons that stopped working are adblock plus, ghostery, dark mode, and another adblock

Wšykne wótegrona (3)

philipp
philipp
  • Moderator

Wubrane rozwězanje

hi w00tnoway, this is/was caused by an unforeseen technical problem unfortunately (an expired certificate used in the process of verifying addon signatures).

a fix for this is already being rolled out - for details, please see: Add-ons disabled or fail to install on Firefox

Paul
Paul
  • Moderator
  • Jaden z 10 nejlěpšych sobustatkujucych

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.