To use this plugin, simply go into its settings and add a new frame, either from a preset shipped with the plugin, or a custom one that you can edit yourself. Each frame's pane can be opened using the "Custom Frames: Open" command.
### On Obsidian Mobile
Unfortunately, Obsidian Mobile does not run on [Electron](https://www.electronjs.org/), which is what allows iframes and [webviews](https://www.electronjs.org/docs/latest/api/webview-tag) to be displayed with very few restrictions related to cookies, cross-origin resource sharing, and so on. This means that a lot of sites won't work there, especially ones that you have to log in to. However, when you create a frame, you can toggle the "Disable on Mobile" option to hide a Desktop-only frame in Obsidian mobile.
If you create a frame that you think other people would like, don't hesitate to create a pull request with [a new preset](https://github.com/Ellpeck/ObsidianCustomFrames/blob/master/src/settings.ts#L5).
Thanks to [lishid](https://github.com/lishid) for their help with making iframes work in Obsidian for a purpose like this. Also thanks to them for *motivating* me to turn Obsidian Keep into a more versatile plugin, which is how Custom Frames was born.