Firefox 5.0 has the option to "switch to tab" if the requested URL or search terms point to an already open URL (great thing by the way).
Now, to open a URL from command line to Firefox a mere firefox http://myurl.com
would do, but even if that URL already is open, Firefox will open it once more in another tab.
How can I---from command line---tell Firefox to open the desired URL in an already existing tab if possible?
You can do it like:
OR with full path
"C:\Program Files\Mozilla Firefox\firefox.exe" -new-tab "https://www.useotools.com"
Well at least one possible method is to modify your about:config files. See http://www.ghacks.net/2009/07/03/force-firefox-to-open-links-in-same-tab/ for details as to how to do this.
It is not possible at the moment.
firefox
will work fine; ifDISPLAY
variable has a valid value; if not you need to set it manually