In previous companies, I'd decided not to test against Skype plugin breaking my website's UI.

Is it common enough now that it should be tested, just as Flash is/was common place?

I have no analytics on how many users are having the Skype plugin installed which messes with the UI of any telephone numbers.

Having a hard time determining how to justify testing this and if there are other common plugins I should be aware of.

  • AdBlock, NoScript, Ghostery...
    – Edu
    Jan 14, 2013 at 14:18
  • @Edu how many people run those ? I think those are more 'techy' rather than something like Skype. Interesting question though, I don't know numbers Jan 14, 2013 at 14:42
  • 1
    @PhilKirkham Good point. At least for adblock statistics are available at addons.mozilla.org/en-US/firefox/addon/adblock-plus/statistics/… and answer seems to be about 15 000 000 daily users.
    – Edu
    Jan 15, 2013 at 8:39

2 Answers 2


I believe most computer users in the general population do not install any plugins at all -- especially if you consider mobile users. Personally, I would not do any plugin compatibility testing without explicit evidence of a conflict.

By the way, this recommends a way to prevent the Skype plugin from breaking your page layout.


I have always taken the approach that if people install plug-ins that mess with their UI, they are doing it at their own risk. It might be a good idea to take a cursory look at your UI while using some of those plug-ins, but I wouldn't spend very much time at all validating or developing around those plug-ins, except for very high severity issues.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.