Regarding the Options page: Firefox allows multiple tabs as your home page, and unfortunately, it's a little too easy to make the Options page one of your home tabs. To edit that out, you can use either of these methods:

Options page

Switch over to the Options page, and select General in the left column. Toward the top of the page, in the Startup section, check the Home Page field:

Look for a vertical bar character. As a simple example with short URLs:

https://mozilla.org/|about:preferences

The bar definitely can be hard to spot with long URLs, but when you find it, delete whichever of these you find --

|about:preferences
|about:preferences#general

-- I suggest deleting the bar last so things don't accidentally get mushed together.

Firefox will save the edit when you tab out of or click away from that box.

Don't click the "Use current pages button" or you'll have to start again.

about:config Preferences Editor

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste home and pause while the list is filtered

(3) Double-click the browser.startup.homepage preference and remove whichever of these you see --

|about:preferences
|about:preferences#general

-- I suggest deleting the bar last so things don't accidentally get mushed together.

If Firefox sometimes displays your previous session windows and tabs, it may indicate that Firefox did not shut down correctly. In other words, Firefox may think it is recovering from a crash.

For best results, quit Firefox using the exit command on the menu. Either:

• "3-bar" menu button > "power" button
• (menu bar) File > Exit

This helps ensure that the session history file is cleaned up so Firefox does not mistakenly think it crashed.

If Firefox always shows your previous session windows and tabs, there are two possible causes.

One is your startup setting on the Options page, as described in this article: Startup, home page, tabs, and download settings.

A second is a setting in an optional settings file named user.js which will override your normal setting. You can check and remove the file using the steps in this article: How to fix preferences that won't save. By default, Windows doesn't show the .js file extension. To work with files as accurately as possible, I suggest showing all file extensions. This Microsoft support article has the steps: http://windows.microsoft.com/en-us/wi.../show-hide-file-name-extensions.