http - Using in-url basic authentication in firefox -

I'm using Firefox to launch Firefox from the command line in a script to get snapshots of pages. These pages have basic HTTP authentication when using:

  Firefox http: // user: pass@url.com  

Either a dialog appears Or authentication does not work at all.

Is there any alternative to Firefox open the page without showing the dialog?

Open the about: config page in Firefox. Create a new integer key (right-click-> new-> integer): network.http.phishy-userpass-length with value 255