If Bouncer does not detect the Chrome extension it defaults to Via even if Hypothesis is embedded on the page

[mkdir-washington-edu]

Describe the bug When bouncer is directed to a page where Hypothesis is embedded it treats it as if it were any other page; if checks for the Chrome extension and if it is not found it opens Via. But there are pages with Hypothesis embedded that rely on cookies or do not work in Via, and users of those pages can not link to annotations on those pages if they are not running Chrome.

To Reproduce Steps to reproduce the behavior:

1. Open https://press.rebus.community/openamlit/chapter/edgar-allan-poe/
2. Note how Hypothesis is embedded
3. In a browser without the Chrome extension open this link: https://hyp.is/-stKwuY7Eeq-AuMNi82WHw/press.rebus.community/openamlit/chapter/edgar-allan-poe/
4. Note this opens in Via

Expected behavior While the reproduction doesn't involve a site that relies on cookies or blocks proxies, if it did you would still want to be able to get to a given annotation on that site. Via will stop you from doing so even though Hypothesis is embedded.

[mkdir-washington-edu]

See also:

• https://github.com/hypothesis/browser-extension/issues/1355
• https://github.com/hypothesis/product-backlog/issues/720