Firefox supports WebExtension APIs, which in most cases are compatible with the extension APIs supported by Chrome, Opera and Edge, so your extensions will run in Firefox with just a few changes.
Firefox pódpěra API WebExtension, kótarež su zwětšego z API rozšyrjenjow kompatibelne, kótarež pódpěraju se pśez Chrome a Opera a Edge, tak až budu waše rozšyrjenja z jano mało změnami w Firefox funkcioněrowaś.