About Audio Equalizer
Audio Equalizer is a small tool that lets you adjust the balance between low, middle and high frequencies in any web audio. If a laptop speaker sounds thin or a podcast is muddy, you open the toolbar popup and adjust the bands. The developer is listed as Muyor and publishes under the MyBrowserAddon name; the Firefox listing dates from 2018.
The popup includes presets for styles like pop, club, party and soft rock, and you can save your own setting for later. There is a mono switch, which merges the channels for people who are deaf in one ear, and a dark theme. It works on pages that use HTML5 audio or video.
Trust is mostly fine but not perfect. Firefox lists it under the Mozilla Public License and marks it Recommended, and the Chrome listing says the developer collects no data. However, it asks to read and change every site, and we could not find a public source repository, so we could not check the code against the listings. The Firefox rating is 4.0 from about 700 ratings. It is a good pick for simple tuning, and a poor one if you want a deep studio-style equaliser.
Pros and cons
- Presets such as pop, club and rock, plus your own saved settings
- Mono option for people who hear better in one ear
- Marked Recommended by Firefox, with about 52,000 Firefox users
- Free, with updates in mid-2026
- Needs access to all websites
- We could not find a public source repository
- Firefox rating is below 4 from about 700 ratings
Permissions
It can read and change data on all websites, add a right-click menu entry and store your presets. It needs the site access to attach the equaliser to audio on any page.
