hi Michaelsart, no mozilla will not access you private documents, photos and other stuff. all account services are fully optional, so you don't have to use them. this clause probably refers to functionality to upload a picture for your account or to sites like addons.mozilla.org where users can sign in with their account and distribute their extensions, leave reviews etc...

Thank you. I'm afraid I have become a bit paranoid from all the ridiculous "permissions" I've come across when downloading apps. One app that was basically a static 4" ruler said they needed access to practically all of my files and would have the right to "alter" my text messages. When I asked about it I was told I didn't have to download the app if I was not comfortable with his requirements. I wonder how many people actually read the Permissions lists and ask for clarifications when not sure? Since then I read all Terms and when confronted with any vague statements I have to ask.

Thanks for taking the time to respond.