Chances are that you are not a begginer so I won't go much into details of what Bookmarklets are.
Three ways to create a bookmarklet.
CMD + Dif you're using a MAC or
control + Dif using Windows
This bookmarklet lets you do a
site: search on the current website. You can find a complete guide on search operators and amend the following JS script as needed.
Shortcut: Drag this into your bookmarks bar 👉 Site search
This ahrefs bookmarklet is one of my go-to for opening the current URL in the Site Explorer with an Exact URL match.
Shortcut: Drag this into your bookmarks bar 👉 Open in ahrefs
This little gem allows you to see the current URL in Google's text-only cache version in order to see what a web page looked like the last time Google visited it.
Shortcut: Drag this into your bookmarks bar 👉 Google's cache
This shortcut lets you open the current URL in Google search console with a query breakdown. There are a few applied filters such as:
Search type: Web
Date: Last 28 days
Shortcut: Drag this into your bookmarks bar 👉 Open in GSC