One of the simplest ways is opening the developer toolbar using F12 (or Command+Shift+I if I remember correctly) and navigating to the Storage tab and selecting Cookies on the left panel. Then you can remove all items at once or one by one.

Your answer is much appreciated. Unfortunately F12 on my keyboard lowers the volume and Command+Shift+I doesn't do anything....

I would love to be able to delete cookies from a travel website that seems to remember the price quote and when I go back to it, it keeps increasing it ...

Köszönöm.

In that case, you can also reach it from the menu: Tools -> Browser Tools -> Web Developer Tools.

Thank you very much. This worked, I was able to delete the cookies for the travel website in question. After deleting the cookies, the initial lower price showed up. Unfortunately information is probably stored someplace else too, as even after deleting the cookies, the website knew about the dates/times I originally picked. I had to change the time and when I did that, the price jumped... Sometimes it is hard to beat the system.

Regardless, I am saving your instructions, they might come in handy in the future.

You can remove the Cookies for a specific websites via "Manage Data".

• Settings -> Privacy & Security
  Cookies and Site Data: "Manage Data"

You only need to use the Storage Inspector if you need to remove or want to inspect a specific cookie.

• https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

Thanks.