If you’ve downloaded Safari 5 to try some extensions, maybe you will see the dialog of “Safari cannot install this extension”, because “Extensions are disabled”. So what you gonna do? Here is a simple steps to help you out.
- click the “Safari” on your menu bar.
- click preferences menu item.
- click advanced tab.
- check the box marked Show Develop menu in menu bar
- click the develop menu and then click enable extensions
The image below shows on Safari 5 on Mac OS and Windows.
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