Newsblur for Android uses the system wide preferred browsers. If you have multiple browsers, you typically do not set a system-wide preference.
When reading Newsblur, this is annoying because you have to select the browser every time (two clicks and a certain delay.)
It would be cool if you could specify a default browser for Newsblur, or if you could read the content in the Newsblur app itself. Not sure if it’s feasible, but you can embed Chrome, like the Lastpass app.
Do any other apps do this? In iOS I have it, but it’s easy to figure out if the user has Chrome installed.
What version of Android are you running?
In 4.4 this first time I click the story title or a link in the story itself I need to select which browser to use but I can then select to always use that browser and it never prompts me again.
Not aware of any other apps that have this. Newsblur is the only app from which I open a ton of URL’s 
Using Android 4.3. I can set the browser and perhaps I should.
I think this is now a standard Android feature if you have multiple apps installed that can handle a particular request.
For example, the first time I click a link to an article on the Guardian web site I will get prompted in the same way to select whether I want to open the article in a browser or the Guardian app itself.