If you are using Firefox for the first time and wanted to import all the browser setting from Internet Explorer or Opera, here is the simple step to do it.
Go to File-> Import.

The import wizard is opened and you can select the browser from where you would like to import all the settings.

After selecting the browser, you need to select the items to import. By default all the items are selected. The items displayed will depend on the browser selected. The following items are available in IE.
- Internet Options
- Cookies
- Browsing History
- Saved Form History
- Saved Passwords
- Favorites
Once you have selected the items, click next and all the items will be imported to Firefox.
