[Bug 1959747]

[adibadi]

Debian 11 just upgraded to Thunderbird 102, which has removed the
possibility of disabling webrender, rendering Thunderbird on my computer
basically unusable. I was forced to downgrade to version 91.

high CPU usage and around 100ms delay on hover animations when moving
mouse over emails and menu items.

System is Debian 11.5, Xfce, AMD Ryzen 4750u with integrated graphics in
a Thinkpad T14 AMD Gen 1.

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https://bugs.launchpad.net/bugs/1959747

Title:
  [upstream] Very high CPU and slow responsiveness in Thunderbird 91

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