And setting `security.sandbox.content.read_path_whitelist` to `$SNAP/` (e.g. `/snap/firefox/595/`, the trailing slash is important), also makes the problem go away, confirming that the content process sandboxing is what prevents the WebGL code from accessing the EGL library.
And setting `security. sandbox. content. read_path_ whitelist` to `$SNAP/` (e.g. `/snap/ firefox/ 595/`, the trailing slash is important), also makes the problem go away, confirming that the content process sandboxing is what prevents the WebGL code from accessing the EGL library.