I have the app on my Mac w/ Safari as well. Where it asks a bit less frequently for the master password. With Firefox on the PC I have to enter my lengthy master pwd almost on every login to a website. Which is somewhat annoying. And occasionally I have to change a password. Which often backfires. Especially if the website asks for the old and then the new password. I had just thought out a new one and copied it to the clipboard. Then revealed the old one and manually typed it in. Then pasted the new one into the "new password" field. Submitted and changed successfully on the web site. Back to 1Password where I clicked on "Edit" the entry for the website I just changed the password for, and then tried to paste my new password into the corresponding password box. To my surprise it no longer worked and 1Password offered a new one. So now I have no recollection of the one I just changed, and have to start a password recovery process. Annoying to say the least...