My safari refuses to let me install any extension. All installations ended up with a message:
Safari can't install this extension
An error occurred while installing the extension <extension name>.
I have tried at least 2 dozens of unrelated extensions from safari extension page. Restart safari many times. Nothing works!
What can I do? Can I reinstall Safari? If I reinstall Safari, how do i ensure the passwords that are saved by Safari are not lost?
I am using OS X Yosemite 10.10.3 on rMBP 15″ 2014 model.