Mozilla removed it. This can happen when issues are found during the review of the extension or theme, or the extension or theme has been abusing the terms and conditions for addons.mozilla.org. The developer has the opportunity to resolve the issues and make the add-on available again.
Mozilla lo ha removite. Isto pote evenir quando problemas es trovate durante le revision del extension o thema, o le extension o thema ha abusate le terminos e conditiones pro addons.mozilla.org. Le disveloppator ha le opportunitate de resolver le problemas e render le additivo disponibile de novo.