Sorry if my original post was not clear enough. Let me try again. When I right click on the clipper icon in Google chrome, a context menu opens up. I then select the option that says "this can read and change site data" and three more options appear:
"When you click the extension"
on the current domain
"on all sites"
So while clipper is designed to run on all sites, google chrome can restrict it so it only runs in a narrower range of pages. This is presumably intended to protect the user's privacy by giving control over when an app (like clipper) can 'see' the page content and when it can't . I have selected the first option "when you click the extension".
With that setting chosen I expect to then be able to use the clipper icon to clip a selected page. In this case when I click the clipper icon I get prompted to reload the page. this makes sense since the clipper hasn't been able to see the page so far. What should happen I think, is that when the page is reloaded Chrome should give clipper access to it. But nothing useful happens after I reload. If I click the clipper icon after the reload, the same instruction to reload the page appears once more, and so on.
If I set the third option instead "on all sites", then clipper works as it should, but that way I have given clipper permission to access all pages I visit, even when I have no intention of clipping those pages.
In short, the privacy option that Google have provided is interfering with how clipper developers expect it to work, with the result that users can set options that make clipper appear broken. I'm guessing that probably clipper was designed before Google provided this new privacy option. Now that the privacy option is there, I would think clipper could be modified to work with his new feature. My bug report is intended to make developers aware that there is an issue. Obviously it is up to the developers whether they want to accommodate it, but I think they ought to care to do so. It doesn't look good on evernote that they aren't keeping an eye on things and testing in the developing real world environment.