How to reset firefox browser

Hi, if you mean that you want to go back to the original settings and clean out add-ons, there is a "Refresh" feature for that. See: Refresh Firefox - reset add-ons and settings.

If you wanted to clear data like cookies, browsing history, etc., there is a completely different feature for that. In fact, you can remove individual categories if you want to keep some data. See:

• Clear cookies and site data in Firefox
• Delete browsing, search and download history on Firefox

nuna cree una contrasena para firefoox siempre entro a mi computadora sin problemas no entiendo ahora cada ves que trato de abrir algo me piden una contrasena

nuna cree una contrasena para firefoox siempre entro a mi computadora sin problemas no entiendo ahora cada ves que trato de abrir algo me piden una contrasena

Dear Rosaily, if this is the same problem, let's continue the discussion about your question here: https://support.mozilla.org/questions/1608069