A browser, as its name implies, is meant for browsing the Web. It is not meant to be used as a text editor. That’s why you seldom find text-editing features like “Find and Replace Text” in the browser.
However, there are times where you are writing your blog post, typing a comment, composing emails or moderating forums, and find yourself wanting to replace a couple of words that appear multiple times throughout. This is where a “Find and Replace Text” function is useful. Let’s take a look at how you can add the find and replace feature in Google Chrome and Firefox.
Search and Replace for Google Chrome
Search and Replace is one of the best find and replace extensions for Google Chrome.

Courtesy of maketecheasier.com