We have previously written about how to set multiple web pages to open when firefox start, today we are going to tell you how to open multiple links in single mouse click when firefox is running.
Multi Site Opener is a cool firefox addon which allows you open multiple websites you specify in separate tabs or in new firefox windows [ as shown in the image below ]
After installing you can locate the extension in firefox under File Menu – Tools >> Multi Site Opener
Just click the option pointing to Multi-Site Opener here and enter the URLs you want to open simultaneously in already running firefox.
Install Multi Site Opener In Firefox [ It is experimental addon so you will need to check the option at the extension page which says Let me install this experimental add-on
Source: [ Technospot ]