Turning this option on will allow you to use various developer tools in browser context (via Tools > Web Developer > Browser Toolbox) and debug add-ons from the Add-ons Manager
Activar iste option te permittera usar plure instrumentos de disveloppator in le contexto del navigator (via Instrumentos > Disveloppamento Web > Instrumentario del navigator) e depurar additivos ab le gestor de additivos