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does 1/3 of the job Rated 2 out of 5 stars
My systemwide default browser is Firefox.
(1: pass) This add-on did open Chrome from a link in the body of a standard message.
(2: fail) Would not open Chrome in "incognito" mode (which I want); when incognito was specified in the path that the add-on uses, nothing opened when a link was clicked.
(2: fail) Opened Firefox from RSS feed headings - the most frequent place I'd need it to open Chrome and why I got the add-on.