Bug#995267: devhelp doesn't load the selected content

Rinat Ibragimov ibragimovrinat at mail.ru
Sat Oct 2 21:46:10 BST 2021

Looks like it's sufficient to remove ~/.local/share/mime/application/x-extension-html.xml
and then to regenerate database:

    update-mime-database ~/.local/share/mime

More information is available in bug #722279, which is very similar to this one. In short,
libwebkit2gtk doesn't like "application/x-extension-html" and decides to not render such

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