Investigate whether some extension technologies are more portable than others

Originally created by @sajolida on #8803 (Redmine)

If we consider having an ISO verification extension in both Firefox and Chrome it would be good to check with the people who volunteered to implement them which extension technologies would make the porting from one to the other easier.

Parent Task: #6851 (closed)

Edited May 15, 2020 by sajolida

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