Extension Tracker

WEBM to MP4 converter: WebCodecs and FFmpeg support

4,000 users Rated 4.32 from 22 ratings Last updated 4 Dec 2025

By dreambuilder.first Live in the Chrome Web Store mfjlolbldcokknaeaaphebndgeicolfm Search Google ↗ Last checked 10 Nov 2026, 20:15 UTC

The listing

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

🎬 Convert WEBM to MP4 instantly and securely. No server uploads, unlimited file conversions, works locally in your browser.Summary from the listing
Developer
dreambuilder.first
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Tools
First published
30 Sep 2024
Last updated
4 Dec 2025
Version
1.4.0
Size
10.07 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

Privacy policy
https://docs.google.com/document/d/10cQiuVkcKjRn8Zuzl4jVyNEytslPU-RQPQqvubL7ybU/edit?usp=sharing
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
4KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov8 Nov2026-09-27: 4,000 users2026-09-29: 4,000 users2026-10-07: 4,000 users2026-10-13: 4,000 users2026-10-20: 4,000 users2026-10-27: 4,000 users2026-11-03: 4,000 users2026-11-10: 4,000 users4,0004KTracking began27 Sep18 Oct8 Nov2026-09-27: 4,000 users2026-09-29: 4,000 users2026-10-07: 4,000 users2026-10-13: 4,000 users2026-10-20: 4,000 users2026-10-27: 4,000 users2026-11-03: 4,000 users2026-11-10: 4,000 users4K
Average rating
4.304.4027 Sep11 Oct25 Oct8 Nov4.324.304.4027 Sep18 Oct8 Nov4.32
Number of ratings
212227 Sep11 Oct25 Oct8 Nov22212227 Sep18 Oct8 Nov22
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-104,0004.3222
2026-11-034,0004.3222
2026-10-274,0004.3222
2026-10-204,0004.3222
2026-10-134,0004.3222
2026-10-074,0004.2921
2026-09-294,0004.2921
2026-09-274,0004.2921
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#11,109
by users, of 292,131 extensions
In its category
#2,683
of 115,641 in Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

Developer history

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

No move to another account and no new contact email since tracking began on 27 Sep 2026.

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
  • <all_urls>Every website
Sites where it runs scripts
  • *://*/*Every website
  • <all_urls>Every website
Browser features
  • contextMenusAdd items to the right-click menu
  • notificationsShow notifications
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • tabsRead the addresses and titles of your tabs

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Html2Email: Send HTML emails from Yandex Mail & Mail.ru1,000 4.7512 Communication
Shortcut Tab Switcher1,000 4.7117 Functionality & UI
Favorite Emojis Copy Popup498 4.508 Functionality & UI
Homepage Quick Access338 4.336 Tools
Blur Rabbit – Blur screen PII for privacy70 5.002 Privacy & Security
Cursorex - Chat with Cursor70 –– Workflow & Planning
All 13 extensions by dreambuilder.first →

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 10 Nov 2026, 20:15 UTC; next check around 18 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “WEBM to MP4 converter: WebCodecs and FFmpeg support” (mfjlolbldcokknaeaaphebndgeicolfm). Chrome Web Store data, last checked 2026-11-10. https://extensiontracker.com/extension/mfjlolbldcokknaeaaphebndgeicolfm. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_mfjlolbldcokknaeaaphebndgeicolfm,
  title   = {WEBM to MP4 converter: WebCodecs and FFmpeg support (mfjlolbldcokknaeaaphebndgeicolfm)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-10},
  url     = {https://extensiontracker.com/extension/mfjlolbldcokknaeaaphebndgeicolfm},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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