This is a browser extension for Chrome and Firefox.
The extension icon becomes active when the page has canonical url, and click it to change url in the address bar to canonical url without reloading the page. Click again to return to the original url. It works in the same way when the url contains extra parameters and flagment. Please use it, for example, when you share a page.
There is no canonical url or already canonical url.
Not canonical url. Clicking it changes to canonical url.
Canonical url. Click to return to the original url.
Not canonical url. Clicking it opens canonical url in new tab.
link[rel="canonical"]
element.content.js
for details.