It is possible to manually set your current page via the context menu, but it seems most users aren't able to discover that feature organically.
e.g. Context menu of the browser action:
![image](https://user-images.githubusercontent.com/319656/59126934-4cb8e080-8934-11e9-9dfb-41f46f857254.png)
e.g. Context menu of the page:
![image](https://user-images.githubusercontent.com/319656/59126971-65c19180-8934-11e9-8c34-9ca1dfe9b3c7.png)
We should try to make this feature more discoverable (and limit the number of users who think the extension is buggy or incomplete, and/or work around issues like this by uninstalling and re-installing the extension).
The current idea for improving this feature is simply to add a more manual, text-entry override into the Options page. It's rather inelegant compared to the context menu, but more users are likely to discover it. Perhaps we could also include a note on the Options page informing the user they could do it via context menu instead.