Note: Before you begin, ensure you are using the supported version of Mozilla Firefox. See the Tested Configurations document for more information.
- Open Mozilla Firefox.
- Go to Tools, Options.
- In the Options dialog box:
- Select the Security tab.
- Select the Warn me when sites try to install add-ons option.
- Select the Content tab.
- Deselect the Block pop-up windows option.
- Click OK to save your options and close the dialog box.