Linux Mint contains following Search engines in default versions
How to Change the Search Engine to Google on LinuxMint Firefox.
Step-1 ( Go to linuxmint search engine pages)
Go to the Linuxmint Search page and navigate to Other search engine and finally hit on
Step-2 (Make Google Default Search Engines)
Hit on google icon shows you need to hit on here to add the google search engine
After opening check the box Make this the current search engines and hit on Add Button.
Step-3 (Restart the mozilla firefox browser to confirm the changes)
After restarting the mozilla browser the adress bar and serch bar looks like this.
Congratulations now you have successfully integrated the default search engine as Google. For support on this procedures and help use the comment section below.