Hello,

I think this isnt possible, but I think what you can do is:

Set the startup page as you want, two sites. And the new tab could be your home page, instead you click in home page button your open a new tab and go to google.com

To do this go to about:config page search for this option "browser.startup.homepage" change his value to the websites that you want that Firefox open when starts, separate the url by "|" , for example:

google.com|myurl.com

After still in about:config search for this option "browser.newtab.url" and change its value to a url that you want as home page, for example:

google.com

You can add the URL's to the target line in the Properties of the Firefox desktop shortcut.

If you exceed the maximum length of the command line then you need to use a cmd (or bat) file instead with the start command to start Firefox.

start "Firefox" /b "C:\Program Files (x86)\Mozilla Firefox\firefxo.exe" <add urls here>

See also:

• https://developer.mozilla.org/Command_Line_Options