FormSaver：Save and restore form inputs automatically...
Use input ids as well as names for identification.
MutationObserver reloading form for changed input elements instead of form elements.
Extension save form elements
- have been filled,
- are not of type
every 10 seconds.
Data is saved to local storage, scoped to both hostname and pathname part of the URL.
Empty form elements are restored after initial page load and on every relevant change made to the DOM tree, using MutationObserver interface.