Sometimes single click stops working, and a double-click is needed.
It happens on some Macintosh machines, which have installed Window assist tools, and checked “Enabled access for assistive devices” in preferences.
Open System Preferences, select “Accessibility”, then disable (uncheck) the option “Enable access for assistive devices”.
Five years ago, universities like MIT and Stanford first opened up free online courses to the public. Today, more than 700 schools around the world have created thousands of free online courses. See
500 Free Online Programming & Computer Science CoursesRead MoreThe badge is using Mozilla OpenBadges(http://openbadges.org/) technology to let people display verifiable acheivements.
IBM gave me 4 badgesRead MoreFirefox is turning 10 today and to celebrate, Mozilla is launching a couple of new projects today, including a new privacy initiative and the Firefox Developer Edition(https://www.mozilla.org/en-US/fi
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