It uses a cookie. To clear cookies when you quit Firefox, go to...
Note that this will not allow you to use "Remember me" check boxes when you sign-in to websites.
Open your Firefox preferences (either edit->preferences or tools->options) and click the security tab. In the "passwords" section, click "Exceptions...". This will list all the sites you've told Firefox not to store passwords for. Find the site you want to remember the password for in this list, click it, then click remove. Now the next time you visit the site, Firefox will ask you if you want to remember the password.
'Home' is a function of the web browser, found in its preferences. You can have a 'Home Page' in Safari, and a different one in Firefox. Safari/Firefox > Preferences > General > Home Page
File>Preferences in Firefox for Win or Unix
While it all matters in your preferences, out of those i prefer chrome and explorer. Again, it is all up to preferences.
OK, What?
firefox -edit-preferences-main-manage add ons- enable
In Firefox, go to Preferences in the Firefox menu. Click on Privacy. Under History, remove the tick beside "Remember what I enter in forms and in the search bar". At the bottom, after "Private data" click the "Settings" button. Remove the tick from "Saved Form information". Click OK.
Open Preferences from the Firefox menu and select the Privacy tab. There you have options, including Clear Now, to manage the storing of the history.
Tools -> Options -> Privacy tab -> Firefox will: choose Never remember history option from drop down list
Go to options Advanced settings Sytem defaults Solution: Open Firefox. At the top of the Firefox windowOn the menu bar, click on the ToolsFirefoxEdit menu, and select Options...Preferences.... Select the Advanced panel, then click the General tab, and then click Check Now. Select Yes to set Firefox as your default browser.
To set the default browser on a Mac use the browser's Preferences: Any available browser can be set as the default in the General section of Safari's Preferences. The "Default web browser" drop down menu will list all available browsers on the Mac so you can select which you want to use as the default. In the Advanced section of the Firefox Preferences tick the "Always check to see if Firefox is the default browser on startup" box In the Basics section of the Chrome Preferences click on the "Make Google Chrome my default browser" button.
This problem happens for a variety of reasons but the main reason or cause that this happens to me is because of a new add-on. Try to uninstall any recent add ons and see if that helps. Otherwise I have had to remove all instances of firefox from my computer and then restart and download a new "clean" version of Firefox. Try starting FireFox in Safe Mode (found in the start menu)