Yahoo Inc.’s quarterly net revenue fell 4 percent and it forecast a further slide this quarter as it struggles to revive growth in the face of intense competition from Google and Facebook.

Yahoo shares were down 4.4 percent, at $15.39, in extended trading Tuesday.

Net revenue, which excludes revenue shared with Web site partners, totaled $1.2 billion in the three months ended Dec. 31, down from $1.26 billion a year earlier. Analysts polled by Thomson Reuters I/B/E/S were looking for $1.19 billion in net revenue.

And it projected that net revenue in the first quarter will range between $1.02 billion and $1.08 billion, compared with the $1.13 billion expected by analysts.

Its fourth-quarter earnings also lagged targets.

Yahoo said its net income in the fourth quarter was $312 million, or 24 cents a share, up from  $153 million, or 11 cents a share, a year earlier. Analysts polled by Thomson Reuters I/B/E/S were looking for 22 cents a share.