Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of The ACCurate Syncer

The ACCurate Syncer by Isaac Murtagh

Sync live iHeart Radio audio with your TV by delaying the stream to match what's on screen.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
The ACCurate Syncer being used on iHeart Radio
About this extension
If you've ever tried listening to live radio commentary while watching a sports stream, you know the pain — radio is 20 to 60 seconds ahead of TV. Commentary spoils every try, every goal, every big moment before you've seen it happen.

The ACCurate Syncer fixes this. It delays the iHeart Radio live stream so the audio lines up with what's actually on your screen.

How it works:
1. Open a live stream on iHeart Radio and hit play
2. Click the extension icon to open the syncer
3. Hit pause — the audio mutes and a timer starts counting
4. Wait until the commentary matches your TV picture (usually 20-40 seconds)
5. Hit play — the stream rewinds by exactly how long you waited

That's it. Audio and video are now in sync.

Need to adjust? Use the +5s and -5s nudge buttons to fine-tune the delay. Hit the On Air button to jump back to live at any time.

Built for the Alternative Commentary Collective (ACC) on iHeart Radio, but works with any live stream on the platform. No accounts needed, no data collected, everything runs locally on your device.
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access browser tabs

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Support site
Version
0.1.0
Size
1,016.87 KB
Last updated
3 days ago (Feb 15, 2026)
Related Categories
  • Photos, Music & Videos
  • Games & Entertainment
License
GNU Lesser General Public License v3.0 only
Version History
  • See all versions
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.