Extension Tracker

Mobile Simulator – Responsive Testing Tool

1,000,000 users Rated 4.93 from 5,305 ratings Last updated 11 Nov 2026

By Mobile FIRST Live in the Chrome Web Store ckejmhbmlajgoklhgbapkiccekfoccmk Search Google ↗ Last checked 12 Nov 2026, 05:34 UTC

The listing

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

Phone Simulator – Free Chrome Extension to test and preview your site on 80+ devices.Summary from the listing
Developer
Mobile FIRST
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Developer Tools
First published
5 May 2020
Last updated
11 Nov 2026
Version
4.26.0
Size
11.5 MiB
Minimum Chrome
88
Languages
52 languages

Deutsch, English, Filipino, Indonesia, Kiswahili, Melayu, Nederlands, Tiếng Việt, Türkçe, català, dansk, eesti, español, español (Latinoamérica), français, hrvatski, italiano, latviešu, lietuvių, magyar, norsk, polski, português (Brasil), português (Portugal), română, slovenčina, slovenščina, suomi, svenska, čeština, Ελληνικά, български, русский, српски, українська, עברית, العربية, فارسی, मराठी, हिन्दी, বাংলা, ગુજરાતી, தமிழ், తెలుగు, ಕನ್ನಡ, മലയാളം, ไทย, አማርኛ, 中文（中国）, 中文（台灣）, 日本語, 한국어

Website
webmobilefirst.com
Support page
https://www.webmobilefirst.com/en/support/?utm_source=chrome&utm_campaign=store
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
980K1M1.02MTracking began 26 Sep 202626 Sep3 Oct10 Oct17 Oct24 Oct31 Oct7 Nov2026-09-26: 1,000,000 users2026-09-30: 1,000,000 users2026-10-07: 1,000,000 users2026-10-15: 1,000,000 users2026-10-20: 1,000,000 users2026-10-26: 1,000,000 users2026-10-28: 1,000,000 users2026-10-31: 1,000,000 users2026-11-03: 1,000,000 users2026-11-05: 1,000,000 users2026-11-07: 1,000,000 users2026-11-12: 1,000,000 users2026-11-12: new version2026-11-07: new version2026-11-05: new version2026-11-03: new version2026-10-31: new version2026-10-28: new version2026-10-26: new version2026-10-20: new version1,000,000980K1M1.02MTracking began26 Sep17 Oct7 Nov2026-09-26: 1,000,000 users2026-09-30: 1,000,000 users2026-10-07: 1,000,000 users2026-10-15: 1,000,000 users2026-10-20: 1,000,000 users2026-10-26: 1,000,000 users2026-10-28: 1,000,000 users2026-10-31: 1,000,000 users2026-11-03: 1,000,000 users2026-11-05: 1,000,000 users2026-11-07: 1,000,000 users2026-11-12: 1,000,000 users2026-11-12: new version2026-11-07: new version2026-11-05: new version2026-11-03: new version2026-10-31: new version2026-10-28: new version2026-10-26: new version2026-10-20: new version1M
Average rating
4.804.905.0026 Sep10 Oct24 Oct7 Nov4.934.804.905.0026 Sep17 Oct7 Nov4.93
Number of ratings
5,2005,30026 Sep10 Oct24 Oct7 Nov5,3055,2005,30026 Sep17 Oct7 Nov5,305
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-121,000,0004.935,305
2026-11-071,000,0004.935,298
2026-11-051,000,0004.935,293
2026-11-031,000,0004.935,284
2026-10-311,000,0004.935,276
2026-10-281,000,0004.935,277
2026-10-261,000,0004.935,278
2026-10-201,000,0004.905,272
2026-10-151,000,0004.915,241
2026-10-071,000,0004.905,215
2026-09-301,000,0004.905,195
2026-09-261,000,0004.905,191
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#174
by users, of 292,130 extensions
In its category
#13
of 30,442 in Developer Tools

What changed

Every change found on a check, newest first

  1. New version 4.26.0, replacing 4.25.0.

  2. New version 4.25.0, replacing 4.24.0.

  3. New version 4.24.0, replacing 4.23.1.

    Renamed from “Mobile simulator - responsive testing tool” to “Mobile Simulator – Responsive Testing Tool”.

    The summary on the listing changed.

  4. New version 4.23.1, replacing 4.23.0.

  5. New version 4.23.0, replacing 4.22.2.

  6. New version 4.22.2, replacing 4.22.1.

  7. New version 4.22.1, replacing 4.22.0.

    Moved from Tools to Developer Tools.

  8. New version 4.22.0, replacing 4.21.2.

    Added the site where it runs scripts https://appetize.io/embed/*.

    The developer's display name changed from “François Duprat” to “Mobile FIRST”.

    The store now lists the developer's business name, “Mobile FIRST”.

    Moved to a different publisher account.

Developer history

Moves to another publisher account and new contact emails, newest first

  1. Moved to another publisher account, from François Duprat to Mobile FIRST.

    The developer's display name changed from “François Duprat” to “Mobile FIRST”.

    The store now lists the developer's business name, “Mobile FIRST”.

    What it can access changed the same day.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • *://*/*Every website
  • <all_urls>Every website
Sites where it runs scripts
  • <all_urls>Every website
  • https://appetize.io/embed/*appetize.io
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • commandsAdd keyboard shortcuts
  • contextMenusAdd items to the right-click menu
  • declarativeNetRequestBlock or change network requests, using rules
  • offscreenOpen a hidden page for background work
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • tabCaptureCapture video and sound from tabs
  • tabsRead the addresses and titles of your tabs
  • webNavigationFollow your browsing, page by page
  • webRequestWatch network requests on the sites it can reach

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 12 Nov 2026, 05:34 UTC; next check around 19 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Mobile Simulator – Responsive Testing Tool” (ckejmhbmlajgoklhgbapkiccekfoccmk). Chrome Web Store data, last checked 2026-11-12. https://extensiontracker.com/extension/ckejmhbmlajgoklhgbapkiccekfoccmk. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_ckejmhbmlajgoklhgbapkiccekfoccmk,
  title   = {Mobile Simulator – Responsive Testing Tool (ckejmhbmlajgoklhgbapkiccekfoccmk)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-12},
  url     = {https://extensiontracker.com/extension/ckejmhbmlajgoklhgbapkiccekfoccmk},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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