This works around a problem in webkit2gtk where the download dialog
sometimes only renders a blank screen. Setting the environment variable
seems to help, not only in the cases that the issue describes (with a
NVidia graphics card), but also in my testing in a VM.
Fixes: #12587
Cherry-pick-of: #12616
Keyman makes it possible for you to type in any language on Windows, macOS, Linux, iPhone, iPad, Android tablets and phones, and even instantly in your web browser. Create keyboard layouts with Keyman Developer and share them with the community in the keyboards repository. The Keyman Community have already contributed keyboard layouts for over 2,000 languages!
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Copyright (c) SIL International.
Keyman is an open source project distributed under the MIT license.