This wikiHow teaches you how to set up a connection to a proxy server via the Firefox browser settings. You cannot follow this process on the mobile version of the Firefox app.
Step

Step 1. Open Firefox
The app icon looks like a blue globe surrounded by an orange fox.

Step 2. Click the button
It's in the upper-right corner of the Firefox window. After that, a drop-down menu will be displayed.

Step 3. Click Options
It's in the middle of the drop-down menu. After that, the settings page will open.
On a Mac or Linux computer, click “ Preferences ”.

Step 4. Click General
This tab is on the left side of the Firefox window.
If this tab is blue, the tab “ General " has been displayed.

Step 5. Scroll to the “Network Proxy” segment
This segment is at the end of the Firefox page.

Step 6. Click Settings…
It's at the far right of the page. After that, the “Proxy Settings” window will be opened.

Step 7. Check the box "Manual proxy configuration"
It's at the top of the window.

Step 8. Enter the proxy information
You need to fill in the following fields:
- “ HTTP Proxy ” – Enter the IP address of the proxy server you want to use.
- “ Port ” – Enter the server port number in this field.

Step 9. Check the box "Use this proxy server for all server protocols"
This box is just below the " HTTP Proxy " column.

Step 10. Click OK
It's at the bottom of the window. After that, the settings will be saved.