Firefox and Thunderbird Slowing down with Dual Monitor
At first the problem happens to only FF.
With today updates on TB, now the TB is acting up when moving to the second screen.
The program will slow down tremendously without doing anything.
After doing some researches, it is a problem with “hardware acceleration”.
To resolve the issue with Firefox,
1. Go to Tools -> Options -> Advanced Tab
2. Uncheck “Use hardware acceleration when available”
For Thunderbird,
1. Go to Tools -> Options -> Advanced -> General Tab
2. Click on “Config Editor”
3. Type “layers” on Filter box to find “layers.acceleration.disabled”
4. Change the value from “false” to “true” to disable hardware acceleration on TB
Now you can move FF and TB to both screens without freezing problem.
PS. My rig is an old Intel Dual Core CPU with 3GB RAM running on Windows XP SP2. This solution may or may not apply to other OS versions.
Update #1: Chrome Hardware Acceleration
- Type about:flags into address bar
- Disable “GPU Accelerated Compositing”
- Disable “GPU Accelerated Canvas 2D”
