After chatting with :marcosc it seems that there are questions over the security of sharing files, so we're going to move to a [level 1](https://wicg.github.io/web-share/) implementation only to start with and we will move to a [level 2](https://wicg.github.io/web-share/level-2/) implementation once the issues have been resolved: https://github.com/WICG/web-share/issues/108.
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After chatting with :marcosc it seems that there are questions over the security of sharing files, so we're going to move to a [level 1](https://wicg.github.io/web-share/) implementation only to start with and we will move to a [level 2](https://wicg.github.io/web-share/level-2/) implementation once the issues have been resolved: https://github.com/WICG/web-share/issues/108. This involves removing `canShare` from the spec and not supporting the sharing of files in `share`.