How to Disable Hardware Acceleration (GPU Rendering) in Mozilla Firefox and Thunderbird to Fix Font Problem?
"Hardware Acceleration" (GPU Rendering) is one of the newly introduced features in Mozilla Firefox and Thunderbird. It was introduced to increase performance but some Firefox and Thunderbird users may want to disable it as the text might not look well on their screens.
If you also want to disable Hardware Acceleration feature in Firefox or Thunderbird, you can try any of following 2 methods:
Disable Hardware Acceleration in Mozilla Firefox Using Options Window
1. Open Mozilla Firefox, click on Firefox Menu button and select "Options".
2. Go to "Advanced" tab and disable "Use hardware acceleration when available" option.
3. Click on OK button and restart the browser to take effects.
Disable Hardware Acceleration in Firefox and Thunderbird Using about:config
If you can't follow above mentioned steps, try following alternative method:
1. Open Mozilla Firefox and type about:config in the addressbar and press Enter.
Thunderbird users will need to go to Tools -> Options -> Advanced menu and then click on "Config Editor" button.
It'll ask for confirmation, click on I'll be careful, I promise! button.
2. Now look for following 2 preferences:
3. Both preferences would be set to false. Double-click on both of them and it'll change their values to true.
That's it. Restart the program and it'll turn hardware acceleration feature off.
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