Pale Moon forum

This is a small update to address some media and web compatibility issues.

Changes/fixes:

• Fixed an issue where media playback would not use hardware acceleration properly when using MSE.
  This would cause high CPU usage and/or choppy playback for HD video on e.g. YouTube.
• Fixed ES6 iterator chains to be spec-compliant.
• Fixed ES6 vector append calls and some related memory leaks.
• Added a workaround to reduce the likelihood of a potential rare (timing-critical) crash.

Linux versions will follow shortly.