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Litmus

Chrome extension by litmus-plugin-admins · Productivity · Developer

A Chrome extension in Productivity · Developer with 4 000 users, a small but real audience.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
4 000
Rating
4.5 (40 ratings)
Users, last 18 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
1.2.1
Updated in the store
2025-07-23
Published
2016-01-14
Manifest
V3
Browser access
55 permissions, 1 site pattern

How it has moved

Users
unchanged since 01.09
4k · 2 readings
  1. 2026-09-014k
  2. 2026-09-184k
Rating
unchanged since 01.09
reviewsrating 4.47 · 2 readings
  1. 2026-09-01reviews40rating4.47
  2. 2026-09-18reviews40rating4.47
Users
unchanged since 01.09
4k · 2 readings
  1. 2026-09-014k
  2. 2026-09-184k
Rating
unchanged since 01.09
reviewsrating 4.47 · 2 readings
  1. 2026-09-01reviews40rating4.47
  2. 2026-09-18reviews40rating4.47

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

  • Read and change cookies on the sites it can access cookies
  • See the address and title of every tab you have open tabs
  • Run its own code on the pages it can access scripting
Show the remaining 47
  • Declares *://*.adobe-campaign.com/*
  • Declares *://*.campaignmonitor.com/*
  • Declares *://*.createsend.com/*
  • Declares *://*.eloqua.com/*
  • Declares *://*.eloquaeditors.com/*
  • Declares *://*.exacttarget.com/*
  • Declares *://*.exacttarget.com/cloud/#*
  • Declares *://*.mailchimp.com/*
  • Declares *://*.marketingcloudapps.com/*
  • Declares *://*.marketodesigner.com/*
  • Declares *://*.pardot.com/*
  • Declares *://cloud.goacoustic.com/*
  • Declares *://experience.adobe.com/*
  • Declares *://litmus.localhost/*
  • Declares *://members.exacttarget.com/*
  • Declares *://members.s1.exacttarget.com/Content/Email/*
  • Declares *://members.s10.exacttarget.com/Content/Email/*
  • Declares *://members.s11.exacttarget.com/Content/Email/*
  • Declares *://members.s12.exacttarget.com/Content/Email/*
  • Declares *://members.s13.exacttarget.com/Content/Email/*
  • Declares *://members.s14.exacttarget.com/Content/Email/*
  • Declares *://members.s15.exacttarget.com/Content/Email/*
  • Declares *://members.s2.exacttarget.com/Content/Email/*
  • Declares *://members.s3.exacttarget.com/Content/Email/*
  • Declares *://members.s4.exacttarget.com/Content/Email/*
  • Declares *://members.s5.exacttarget.com/Content/Email/*
  • Declares *://members.s6.exacttarget.com/Content/Email/*
  • Declares *://members.s7.exacttarget.com/Content/Email/*
  • Declares *://members.s8.exacttarget.com/Content/Email/*
  • Declares *://members.s9.exacttarget.com/Content/Email/*
  • Declares *://user-content.s1.sfmc-content.com/*
  • Declares *://user-content.s10.sfmc-content.com/*
  • Declares *://user-content.s11.sfmc-content.com/*
  • Declares *://user-content.s2.sfmc-content.com/*
  • Declares *://user-content.s3.sfmc-content.com/*
  • Declares *://user-content.s4.sfmc-content.com/*
  • Declares *://user-content.s5.sfmc-content.com/*
  • Declares *://user-content.s6.sfmc-content.com/*
  • Declares *://user-content.s7.sfmc-content.com/*
  • Declares *://user-content.s8.sfmc-content.com/*
  • Declares *://user-content.s9.sfmc-content.com/*
  • Put data on your clipboard clipboardWrite
  • Declares file://*
  • Declares http://127.0.0.1/*
  • Declares http://localhost/*
  • Run work in a hidden page offscreen
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

litmus-plugin-admins. Listed website: litmus.com.

Like this one

Listings the catalog judges closest in what they say they do.

  1. Gmail Editor Describes nearly the same job, smaller audience 453 users ★ 5.0
  2. EmailPerfect Describes nearly the same job, smaller audience 15 users
  3. LintMail Describes nearly the same job, smaller audience 8 users
  4. Gmail HTML Insert Describes nearly the same job, smaller audience 91 users
  5. Vorflux Describes nearly the same job, smaller audience 22 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.