Is isear safe?

This extension highlights and navigates multiple search words within Google search result pages and other web pages.

It creates buttons for each space-separated search word so you can jump between matches on the page, and it can automatically import Google search terms unless disabled in settings. You can add selected text as a search word from the right-click menu, run Google searches from the search box, and view match positions with a highlight bar on the right side of the page.