[MrRadar]

There's a Firefox extension to add the rel=noopener attribute to all links (except ones to the same domain): https://addons.mozilla.org/en-US/firefox/addon/dont-touch-my...

[jkeat]

Here's one for Chrome: https://chrome.google.com/webstore/detail/no-opener-no-phish...

[JamieF1]

I made that! Thanks for sharing, didn't expect someone to know about it.