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Sephir — Browser-native AI agent

Chrome extension by admin · Productivity · Tools

A Chrome extension in Productivity · Tools with 8 users, barely installed.

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
8
Rating
not rated yet
Users, last 13 days
+7
Version
1.1.2
Updated in the store
2026-09-17
Published
2026-09-04
Manifest
V3
Browser access
9 permissions, 1 site pattern

How it has moved

Users
+7 since 05.09
1-10 · 8 readings
2026-09-05: appeared in the store2026-09-07: released 1.0.12026-09-08: released 1.0.22026-09-13: released 1.1.12026-09-17: released 1.1.2
  1. 2026-09-051appeared in the store
  2. 2026-09-062
  3. 2026-09-085released 1.0.2
  4. 2026-09-097
  5. 2026-09-139released 1.1.1
  6. 2026-09-1510
  7. 2026-09-168
  8. 2026-09-178released 1.1.2
Users
+7 since 05.09
1-10 · 8 readings
2026-09-05: appeared in the store2026-09-07: released 1.0.12026-09-08: released 1.0.22026-09-13: released 1.1.12026-09-17: released 1.1.2
  1. 2026-09-051appeared in the store
  2. 2026-09-062
  3. 2026-09-085released 1.0.2
  4. 2026-09-097
  5. 2026-09-139released 1.1.1
  6. 2026-09-1510
  7. 2026-09-168
  8. 2026-09-178released 1.1.2

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.

  • See the address and title of every tab you have open tabs
  • Run its own code on the pages it can access scripting
  • See when you navigate between pages webNavigation
Show the remaining 6
  • Schedule work to run later alarms
  • Run work in a hidden page offscreen
  • Open a panel beside the page sidePanel
  • Store data in your browser storage
  • Organise your tabs into groups tabGroups
  • Store data in your browser without the usual size limit unlimitedStorage

The full permission history for this extension

Version history

  1. Version 1.1.2
  2. Version 1.1.1 · Asked for fewer permissions (10, was 11)
  3. Version 1.0.2
Show the remaining 1
  1. Version 1.0.1

What changed recently

  1. Released version 1.1.2 (was 1.1.1)
  2. Package size changed
  3. Asked for fewer permissions (10, was 11)
Show the remaining 7
  1. Store description rewritten
  2. Released version 1.1.1 (was 1.0.2)
  3. Package size changed
  4. Released version 1.0.2 (was 1.0.1)
  5. Package size changed
  6. Released version 1.0.1 (was 1.0.0)
  7. Appeared in the store

The publisher

admin publishes 2 listings we track, 98 users between them.

  1. CaptionGPT - AI Video Summarizer admin · Productivity · Tools · published 2024-12-29 90 users ★ 3.0

Like this one

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

  1. JasprAi: AI Web Agent & Automation Describes nearly the same job, smaller audience 37 users ★ 5.0
  2. BrowseWiz: AI Assistant That Browses for You Describes nearly the same job, smaller audience 582 users ★ 5.0
  3. Slesh: Ask, Search & Automate Any Website with AI Describes nearly the same job, smaller audience 574 users ★ 4.4
  4. Tero Browser Copilot Describes nearly the same job, smaller audience 36 users ★ 5.0
  5. BrowserOps Describes nearly the same job, smaller audience 64 users ★ 5.0

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.

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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.