Kampani ya Mozilla losindikizidwa kutulutsidwa kwachitatu kofunikira kwa msakatuli woyeserera wa Firefox Preview, wopangidwa pansi pa dzina la code Fenix. Nkhaniyi idzasindikizidwa mβkatalogu posachedwapa Google Play (Android 5 kapena mtsogolo ikufunika kuti igwire ntchito). Kodi ikupezeka pa GitHub. Kutulutsidwa koyamba kokhazikika kukuyembekezeka mu theka loyamba la 2020. Pulojekitiyo itakhazikika ndipo zonse zomwe zidakonzedweratu zakhazikitsidwa, msakatuli adzalowa m'malo mwa Firefox ya Android, kutulutsidwa kwatsopano komwe kwasiya. Firefox 69.
Kuwonetseratu kwa Firefox amagwiritsa Injini ya GeckoView, yomangidwa paukadaulo wa Firefox Quantum, ndi malaibulale angapo Mozilla Android Components, zomwe zimagwiritsidwa ntchito kale kupanga asakatuli Yang'anirani Firefox ΠΈ Firefox lite. GeckoView ndi mtundu wina wa injini ya Gecko, yopakidwa ngati laibulale yosiyana yomwe ingasinthidwe palokha, ndipo Android Components imaphatikizapo malaibulale omwe ali ndi zida zokhazikika zomwe zimapereka ma tabo, kumalizidwa kolowera, malingaliro osakira ndi mawonekedwe ena asakatuli.
Zowonjezedwa zida zapamwamba zodzitchinjiriza pakutsata mayendedwe, kulola, mofananiza ndi mtundu wa desktop wa Firefox, kuletsa kutsatsa ndi kachidindo kotsata mayendedwe, zowerengera zapaintaneti, ma widget ochezera pa intaneti, njira zobisika zozindikiritsa ogwiritsa ntchito ndi ma code a cryptocurrencies migodi. Mwachikhazikitso, njira yoletsa yolimba ikugwira ntchito. Malinga ndi omanga, kuloleza kutsekereza kumathandizira kutsitsa masamba ndi avareji ya 20%. Mukakhudza chithunzicho ndi chithunzi cha chishango, zenera limatsegula ndi chidziwitso chokhudza zinthu zotsekedwa ndi kuthekera kowona mwatsatanetsatane mndandanda wotsekera wa malo omwe alipo.