Google Chrome introduced a feature highlighting relevant text snippet by relying on the new Scroll to Text Fragment API.
It seems that at the moment there is no way to disable the feature. Because of that, some users got annoyed by the functionality (e.g. see this issue of the original standard proposal).
In perfect case it would be possible to control "Scroll to Text Fragment" from JavaScript interface.
In that case it would be easy to override/reset the highlight pattern.
However, currently it seems to be impossible to do so.
As a consequence, this extension changes all the links on Google-hosted pages, removing the part responsible for text highlighting.