An anonymous Slashdot reader quotes Softpedia:
Mozilla has announced this week that it is delaying the release of Firefox 49 for one week to address two unexpected bugs. Firefox 49, which was set for release on Tuesday, September 13, will now launch the following Tuesday, on September 20…

Firefox 49 is an important release in Mozilla’s grand scheme of things when it comes to Firefox. This is the version when Mozilla will finish multi-process support rollout (a.k.a. e10s, or Electrolysis), and the version when Firefox launches the new WebExtensions API that replaces the old Add-ons API, making Firefox compatible with Chromium extensions.

Firefox’s release manager explained the delays as “two blocking issues and the need for a bit more time to evaluate the results of their fixes/backouts” — one of which apparently involves opening Giphy GIFS on Twitter.

Read more of this story at Slashdot.

Source: Slashdot – Firefox 49 Postponed One Week Due To Unexpected Bugs