Created attachment 128896 [details] [review]
The list of fallback browsers includes "chromium-browser"; however,
current installations of Chromium install the browser as "chromium".
(Some Chromium packages used to install "chromium-browser" due to binary
name conflicts, subsequently resolved.)
The attached patch adds "chromium" to the list of fallback browsers.
Not that any modern system should ever get to the fallback, but why not. patch applied, thanks.