Chrome is good about letting you choose what type of cookies you want to delete. If you want to save your cookies on your favorite sites or just save passwords, but delete everything else, you can.
Click on the little orange exclamation point on the upper-right side of your screen. Click Settings, then scroll down to the bottom of the page. Click on the blue link that says Show Advanced Settings.
Scroll down to Privacy >> Content Settings. To delete all cookies, click on All Cookies and Site Data >> Remove All. To delete only some cookies, scroll down to specific sites and hover your cursor over it. Click the X on the right-hand side.
It's easy to clear out all your cookies on Firefox. Click on the menu. That's the three horizontal lines on the upper-right side of your screen. Click on History >> Clear Recent History >> make sure only Cookies has a check mark next to it >> Clear Now.
To handpick which sites you want to mange, click on Menu >> Options >> on the left-hand menu, Privacy >> under History, choose Firefox Will: >> click on the down arrow and select Use Custom Settings for History >> on the right side, click on Show Cookies. Type in the website address you want to manage in Search or scroll down to find it >> highlight that site >> Remove Selected.