Greasy Fork is available in English.
Clicking on the "points of failure" chart will open the editor to that location.
If you have the osu! editor open, clicking on the "Points of Failure" chart on a beatmap page will move the editor to around that location.
Note that this script cannot open the osu! editor for you (limitation of osu:// links, I believe). You must already have the correct map open in the editor.
Tested in Firefox w/ Violentmonkey. Greasemonkey and chrome should probably work.