Changes in Opera 38.0 include power use improvements for mobile users, customization for the ad blocker, and numerous bug fixes and other performance improvements.
The full change log has all the details, which as usual distinguishes between the beta and developer versions that led up to the stable version 38.0.2220.29.
There don’t appear to be any security fixes in Opera 38.0, so this isn’t an urgent update.
The announcement for Firefox 47.0 highlights a few changes: synchronized tabs (between Firefox instances), improved video playback, and some security and performance improvements for Android users.
According to the release notes, Firefox 47.0 takes a few more steps in the process of moving away from Flash and toward HTML5 for video, and removes support for some older technologies related to plugins. The click-to-activate plugin whitelist, a security feature that was introduced in 2013, has been removed.
Most importantly, Firefox 47.0 fixes at least thirteen security issues. So don’t delay, update Firefox as soon as you can.
Check your Firefox version and trigger an update by navigating to its About page:
boot13