Missing rel="noopener" on links with target="_blank"

[NormanHoehne]

Dear team,

you should add rel="noopener" for all links that open in a new window to improve security and performance.

Please take a look at:

• https://www.jitbit.com/alexblog/256-targetblank---the-most-underestimated-vulnerability-ever/
• https://jakearchibald.com/2016/performance-benefits-of-rel-noopener/

Chrome has fixed this vulnerability long time a go, but e.g. firefox is still vulnerable.

Cheers, Norman

[nickcernis]

To test (feature/noopener branch):

• Check “Open links in new window?” in widget settings:

Confirm:

• [ ] Icon anchor elements contain rel="noopener noreferrer" as well as target="_blank", and open in new window.

[dreamwhisper]

@nickcernis ready to merge!

[nickcernis]

@dreamwhisper Merged in https://github.com/studiopress/simple-social-icons/pull/85. Thanks for looking at this!