How do I edit cookies in Firefox?

You can edit cookies in Firefox using its built-in developer tools. Here's how:

Accessing Cookie Settings

First, you need to access Firefox's developer tools and navigate to the storage settings where cookies can be viewed and modified.

Open Firefox.
Press F12 to open the Developer Tools, or right-click on a web page and select "Inspect" or "Inspect Element."
In the Developer Tools panel, navigate to the "Storage" tab. If you don't see the "Storage" tab directly, you may need to click the >> symbol to reveal more tabs.
Under the "Storage" tab, you should find a "Cookies" section in the left-hand sidebar.
Select the domain or website under the "Cookies" section you want to view or edit cookies for.

Once you have located the specific cookies for a site, you can make the desired modifications using the following methods:

Double-Click and Edit: You can edit the values of existing cookies by double-clicking inside cells in the Table Widget and editing the values they contain. This allows you to directly modify the name, value, domain, path, expiration date, and other attributes of the cookie.
Adding New Cookies: To add a new cookie, click the “Plus” (+) button. A new row will appear in the table, which you can then edit to create a new cookie. You must fill out all the necessary information, such as name, value, domain, path, expiration date and other required settings.

Let's say you have a cookie named myCookie and you want to change its value from oldvalue to newvalue:

Be careful when editing cookies, as incorrect modifications can affect the functionality of websites or your login sessions.
Changes you make to cookies using the developer tools are typically applied immediately.
Some cookies may be protected by websites. Therefore, you may not be able to directly modify or delete them.

By following these steps, you can effectively manage and edit your cookies in Firefox to suit your needs.