Residential proxy data
Use purchased residential GB and browse available country, state, or city locations from the Residential tab.
Official PreProx Firefox add-on
PreProx Proxy Add-on for Firefox
Manage residential proxy data, synced static lease IPs, or your own manual proxy profiles directly from Firefox. Search locations, choose session behavior, connect, and review the detected proxy IP from one compact add-on panel.
Reviewed September 17, 2026
Official PreProx product page
Proxy sources
Residential, static, manual
Protocols
SOCKS5, HTTP, HTTPS
Minimum version
Firefox 121
Account
Optional for manual proxies
What it does
A complete proxy manager inside Firefox.
The PreProx Firefox add-on keeps pay-as-you-go residential proxies, active static lease IPs, and manual proxy profiles in one panel. Sign in to synchronize supported PreProx products or continue without an account when you only need to configure your own endpoint.
Static lease IP sync
Sign in to load eligible active mobile and WiFi lease IPs without repeatedly copying connection credentials.
Manual proxy profiles
Save compatible HTTP, HTTPS, or SOCKS5 endpoints with optional authentication and return to them later.
Secure account synchronization
Use PreProx login, optional Security PIN verification, and remembered credentials to synchronize supported account access.
Country, state, and city search
Search residential locations, expand the matching hierarchy, and connect from either search results or the location list.
Rotation and sticky sessions
Choose rotating residential IP behavior or a sticky duration from 10 minutes up to 7 days where available.
Residential protocol settings
Save a preferred SOCKS5, HTTP, or HTTPS option for new residential connections through Firefox.
Automatic connection details
After a new connection, review the detected IP address, country, city, and speed returned by the add-on check.
WebRTC leak protection
The add-on applies Firefox WebRTC privacy controls while a verified proxy connection is active.
Connection sources
Choose the proxy source that fits your Firefox workflow.
Switch between Residential, Static Lease, and Manual without leaving the add-on. Only one proxy connection is active in Firefox at a time.
Pay-as-you-go data
Residential proxies
Use purchased residential GB, search available countries, states, and cities, then choose rotating or sticky behavior before connecting.
- Country, state, and city targeting
- Rotation and sticky session controls
- Residential balance visibility
Account synchronization
Static lease IPs
Sign in to synchronize eligible active mobile and WiFi proxy leases, then connect from the Static Lease section while the lease remains available.
- No repeated credential entry
- Assigned location details
- Direct connect and disconnect controls
Bring your own endpoint
Manual proxies
Create reusable profiles for compatible proxy servers you already control. Manual profiles work without purchasing a PreProx proxy product.
- Host, port, and protocol controls
- Optional username and password
- Saved profiles for faster reconnecting
Product interface
Know which proxy Firefox is using.
The add-on keeps the selected tab, target location, residential balance, and connection state visible. The toolbar icon changes when a proxy is active, and connection details appear after a newly completed connection.
- Detected IP, country, city, and speed after a new connection
- Connected, connecting, and disconnected states in one add-on panel
- One active manual, static lease, or residential proxy at a time
Setup guide
Set up the PreProx Firefox add-on step by step.
Install from Mozilla Add-ons, review the requested permissions, choose a proxy source, and confirm the detected route before browsing.
01
Install from Mozilla
Open the official Mozilla Add-ons listing, choose Add to Firefox, and keep PreProx accessible from the toolbar.
02
Sign in or add manually
Sign in to synchronize eligible residential data and static leases, or continue to create a manual proxy profile.
03
Choose a proxy source
Open Residential, Static Lease, or Manual and select the location or saved profile you want Firefox to use.
04
Connect and verify
Start the connection and review the detected IP, location, and active toolbar state before continuing.
Compatibility and limits
Know what is required before installing.
These details describe the current product and distinguish the connection manager from the proxy access used with it.
- Browser
- Mozilla Firefox 121 or newer
- Account
- Required for PreProx residential data and static lease sync; optional for manual proxies
- Proxy access
- Residential data and static leases are purchased separately; installing the add-on does not include proxy traffic
- Permissions
- Proxy settings, storage, notifications, privacy, and web request access used for connection management
- Connection scope
- The selected proxy applies to Firefox, not every application or the full operating system
- Private Windows
- Allow the add-on in Private Windows when you want Firefox to apply proxy settings there
Products and verification
Continue with the right PreProx proxy tool.
Compare proxy access or verify the Firefox connection after installation.
Residential proxy data
Compare pay-as-you-go residential data and session features.
Static lease marketplace
Browse currently available mobile and WiFi proxy leases.
What is my IP?
Check the public IP and location currently visible to a website.
IP reputation lookup
Review available ISP, ASN, location, and IP risk signals.
Other PreProx tools
Choose the tool that matches your device.
Each product has its own official installation page, requirements, and setup guidance.
Common Questions
Installation, compatibility, proxy access, and account requirements explained directly.
What is the PreProx Firefox add-on?
It is a Firefox proxy manager for residential proxy data, eligible static lease IPs, and compatible manual proxy profiles. It applies one selected proxy connection to Firefox from the add-on panel.
Do I need a PreProx account to use the Firefox add-on?
An account is required to synchronize PreProx residential data and static lease IPs. You can use the Manual section without signing in when you already have a compatible proxy endpoint.
Does the add-on include residential GB or a static IP?
No. Residential data and static leases are purchased separately. Sign in with the same PreProx account after purchase to synchronize eligible access.
Can I add my own proxy to Firefox?
Yes. The Manual section lets you save a host, port, protocol, and optional username and password for a compatible proxy you are authorized to use.
Can I search residential proxies by state or city?
Yes. The add-on can search country, state, and city entries and displays the matching location hierarchy. Actual targeting availability depends on current residential network inventory.
Can I use rotating and sticky residential IPs?
Yes. Residential settings include rotating behavior and supported sticky durations from 10 minutes through 7 days. The selected location and network availability still determine the result.
Which proxy protocols does the Firefox add-on support?
The add-on supports SOCKS5, HTTP, and HTTPS proxy settings. Endpoint authentication and behavior still depend on the selected proxy and Firefox support.
How does the add-on verify a proxy connection?
After a new connection, the add-on checks the public route and can display the detected IP address, country, city, and speed. Review those details before relying on a location-sensitive workflow.
Does the PreProx add-on protect against WebRTC leaks?
The add-on applies Firefox WebRTC privacy controls while a verified proxy is active. Browser privacy still depends on cookies, accounts, add-ons, DNS, and other signals, so a proxy alone does not make a user anonymous.
Why should I allow PreProx in Firefox Private Windows?
Firefox requires explicit permission before an add-on can run in Private Windows. Enable it when you want PreProx to control proxy settings for private browsing sessions.
Does the add-on change my whole device connection?
No. It controls Firefox proxy settings while the selected connection is active; other applications keep their own network configuration.
Where should I install the official PreProx Firefox add-on?
Use the Mozilla Add-ons button on this page and confirm the listing identifies PreProx as the developer and support@preprox.com as the support email.
Official download
Install PreProx Firefox Add-on from the official source.
Use the verified destination below and review the current permissions or installation prompt before continuing.