Browser support policy
For the digital collections app, at the moment we have decided our browser support policy is we support:
Chrome (including Android)
Firefox
Safari (mobile and desktop)
Edge
(but not Internet explorer).
And we support most recent version and old versions going back one year from current date.
Resources
Science History Institute has a free (for non-profit/open source) account on http://browserstack.com that can be used to test multiple browsers.
The Can I use... Support tables for HTML5, CSS3, etc site is helpful. Note the “Date Relative” option when looking at a specific feature, that will let you see if a given feature is included in a year-old browser release, not just the most recent.