When zooming with fingers in the B2G browser, links get activated at the same time, leading to spurious experience. For example, on the twitter page, zooming this way will open some of the tweets you pass on.
I've been told on IRC by daleharvey that it has been fixed, and gecko update from today does not expose this behavior anymore, great news!
Hm, sorry, turns out I've been a bit fast in conclusion: scrolling does not activate links anymore, but zooming does.
Bug 787549 will fix this, but we can leave this open to separately verify pinch gestures.
It's confirmed that Bug 787549 also fixes this bug. Resolve as duplicate.