Having covered installing extensions for Chrome manfully let us take a look how to install add-ons in Firefox 4 manfully from File,sometimes you need to install add-ons for Firefox from other websites apart from Mozilla add-ons galley so you can’t trust and install those add-ons directly from other websites instead you can download that add-on,scan with antivirus if you need and then install it manually in Firefox 4.
Installing Add-ons in Firefox 4 manually
- Right click on that add-on and click “Save Link As” to save to your Computer.
- Now open Firefox 4 add-ons manager from Firefox button >Add-ons
- Click Tools for add-ons, click “Install Add-on from File” select add-on saved to your Computer and click Open.
- Add-on will be installed in Firefox 4.
Note:You can also install add-on manually by pressing Ctrl+o and selecting saved add-on from your Computer.