this is a very simple Google Chrome extension to add button on Latex rendered formulas in Web page to copy on the fly the Latex code.
actually plugin supports only www.wikipedia.org and www.mathworld.wolfram.com .
when mouse over a formula appears a "Copy Latex" advise: via left click on formula you can copy it's latex code to your clipboard.
see: https://github.com/SimoSca/Chrome-Extension_LatexFromWeb/blob/master/LICENSE.md
see https://www.youtube.com/watch?v=MTrk9htCG24
You can issue problems or questions on github repository:
https://github.com/SimoSca/Chrome-Extension_LatexFromWeb/issues
on plugin option page (click on plugin icon) you can find other informations.