ChroPath is the highest rated XPath extension.
1) Supports both on Chrome and Firefox.
2) gives very robust relative xpath which can be directly used in automation script.
3) saves around 40-50% manual effort and time of automation script writing.
4) It generates the relative xpath, absolute xpath and css selector just in single
click and gives all selector in single tab.
5) very neat and clean UI.
6) best part it opens in devtools panel so one can easily write own locator
by looking at dom and can verify.
7) Verify XPath and CSS selectors in one place, no need to change dropdown value for different selectors
8) Edit and copy buttons are there for all types of selectors
9) No dependancy on any other tool like FirePath was dependant on FireBug.