---
title: "Custom UserAgent String – Chrome extension stats, history and permissions"
description: "30,000 users, rated 3.84 by 37 people. Version 0.2.5, updated 2026-06-10. Requests 5 permissions."
url: "https://extensiontracker.com/extension/lejiafennghcpgmbpiodgofeklkpahoe"
---

# Custom UserAgent String

Live in the Chrome Web Store.

- Users: 30,000
- Rating: 3.84 from 37 ratings
- Last checked: 2026-09-27 04:50 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #3,261 of 264,703 live extensions
- Rank in Developer Tools: #291 of 27,615

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Add a custom useragent string for desired URLs or domains.

- Extension ID: `lejiafennghcpgmbpiodgofeklkpahoe`
- Developer: [Grephy](https://extensiontracker.com/developer/u04a1722491dced799186d7c552449816)
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2015-12-15
- Last updated: 2026-06-10
- Version: `0.2.5`
- Size: 491 KiB
- Minimum Chrome: 88
- Languages (1): English
- Support page: `https://mybrowseraddon.com/custom-useragent-string.html`
- Chrome Web Store: <https://chromewebstore.google.com/detail/custom-useragent-string/lejiafennghcpgmbpiodgofeklkpahoe>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Flejiafennghcpgmbpiodgofeklkpahoe>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 30,000 | 3.84 | 37 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

**Every website:** it can read and change your data on all the sites you visit.

### Sites

- `*://*/*`: Every website
- `ws://*/*`: Every website
- `wss://*/*`: Every website

### Sites where it runs scripts

- `*://*/*`: Every website

### Browser features

- `declarativeNetRequest`: Block or change network requests, using rules
- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Dark Mode](https://extensiontracker.com/extension/dmghijelimhndkbmpgbldicpogfkceaj) | 2,000,000 | 3.58 | 2,208 | Tools |
| [Screen Recorder](https://extensiontracker.com/extension/dhopldobnfjeckokfjimfcdagmlhjdce) | 300,000 | 3.06 | 311 | Tools |
| [WebRTC Control](https://extensiontracker.com/extension/fjkmabmdepjfammlpliljpnbhleegehm) | 300,000 | 4.45 | 229 | Developer Tools |
| [Audio Downloader Prime](https://extensiontracker.com/extension/flainkeonkoanoijnkojmiiihnfdhipd) | 300,000 | 3.67 | 462 | Tools |
| [Keep Awake (Display \| System)](https://extensiontracker.com/extension/apmicgkbejflkgeljipcebaoeigmangd) | 100,000 | 4.28 | 47 | Tools |
| [Enhancer for WhatsApp™](https://extensiontracker.com/extension/fadfgobhjoibmjilddjdkeppljcmpbii) | 70,000 | 3.63 | 288 | Social Networking |
| [Audio Recorder](https://extensiontracker.com/extension/ngkihcngbjapjmenfaglhpneoacehhgo) | 60,000 | 1.92 | 13 | Tools |
| [Enhancer for Telegram™](https://extensiontracker.com/extension/dafiggkhlbbhfcpgggcfeeoliillkabn) | 50,000 | 3.88 | 344 | Social Networking |
| [Video Downloader Prime](https://extensiontracker.com/extension/gipjangphphajpkddogjcpgaoiidennb) | 50,000 | 3.17 | 138 | Tools |
| [Modify Header Value (HTTP Headers)](https://extensiontracker.com/extension/cbdibdfhahmknbkkojljfncpnhmacdek) | 40,000 | 3.29 | 55 | Developer Tools |

All 18 extensions by [Grephy](https://extensiontracker.com/developer/u04a1722491dced799186d7c552449816).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 2026-09-27 04:50 UTC; next check around 2026-10-01.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “Custom UserAgent String” (lejiafennghcpgmbpiodgofeklkpahoe). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/lejiafennghcpgmbpiodgofeklkpahoe. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_lejiafennghcpgmbpiodgofeklkpahoe,
  title   = {Custom UserAgent String (lejiafennghcpgmbpiodgofeklkpahoe)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/lejiafennghcpgmbpiodgofeklkpahoe},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/lejiafennghcpgmbpiodgofeklkpahoe>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.