Facebook and Instagram users were temporarily unable to access the social networking sites due to an outage that lasted for approximately half an hour Friday.

The outage reportedly affected users in the United States, in the United Kingdom and in the Philippines, Express has learned.

Users who tried to login were greeted with the message, "Sorry, something went wrong. We're working on getting this fixed as soon as we can."

When both social networking giants owned by Mark Zuckerberg suffered an outage, users took to the rival Twitter to vent their frustration.

With the tweeters posting about the outage on both sites and some poking fun at the outage, the terms "Facebook and Instagram" and "#NowFacebookIsDown" became trending.

Meanwhile, Zuckerberg's approval rating from his employees dropped from 99 percent in 2013 to 93 percent in 2014 in a Glassdoor survey, Business Insider reported.

One of Zuckerberg's employees, an iOS software engineer at Facebook Amir Memon, has explained why employees approve of the 30-year-old computer programmer, Internet entrepreneur, and philanthropist.  

"He built this billion user and billion dollar company from his dorm room, overcame one obstacle after another, and assembled a company with the most talented employees in the world," Memon pointed out.

According to Memon, Zuckerberg is strictly focused on "making the world more open and connected," and he "doesn't waver; all the investments in R&D and acquisitions have been along these lines."

"He was the biggest donor of 2013, and is generally a minimalist. He is clearly committed to Internet.org, even though that's not necessarily where the short term revenue increases are. We really feel he wants to change the world for the better," Memon added.

Although his approval rating dropped, Zuckerberg is still one of the ten highest rates CEOs in the US.

Moreover, Facebook's record recently added $1.6 billion to Zuckerberg's bottom line, which raises his net worth to $33.3 billion, USA Today reported.