LaterOn

Project Overview

Bookmarks scattered across browser tabs are hard to organize; LaterOn builds a project-based library that separates read, reading, and unsorted links. It is a Manifest V3 extension for Chrome and Edge that offers both a full-screen workspace and a browser side panel, and all data stays locally in chrome.storage.local.

Item	Value
Type	browser extension, Manifest V3
Hosts	Chrome 121 or later, Edge 121 or later
Current version	1.66.1
Data location	local chrome.storage.local
License	MIT

Pages are not lost when a tab closes; they are collected first and processed per project later.

Supported Hosts

Host	Detail
Chrome	the manifest declares minimum_chrome_version 121
Edge	121 or later, loaded the same way as Chrome
Other Chromium browsers	must support the side panel and the Manifest V3 side panel permission

Key Features

• One-key capture: Alt+1 saves the current page, Alt+Shift+1 saves every tab in the current window
• Project filing: choose a project while saving, or drop pages into a pending bucket and move them later by drag or multi-select
• Automatic metadata: title, summary, cover and source are extracted, and a placeholder fills in when no cover exists
• Deduplicated opening: tapping a saved page switches to the existing tab instead of opening a new one; YouTube is matched by video ID, so playlist and timestamp parameters neither duplicate the page nor reset the playing position
• Side panel continuation: when you switch browser tabs, the panel jumps to the current page and its project and scrolls the selected project chip into view
• On-page translation: Alt+2 calls the built-in Chrome Translator interface on body paragraphs, headings and quotes, and pressing it again restores the original text
• Reading states: unread, reading and read are tracked separately, and read items are cleaned up after the configured number of days, 30 by default
• Project archive: archived projects disappear from normal lists and search, can be searched and restored from the archive view, and deleting a project permanently deletes its pages

Shortcuts and Entry Points

Action	Method
Save current page	Alt+1, or the page context menu
Save all tabs in window	Alt+Shift+1
Translate body text in place	Alt+2
Search from the address bar	type lo, a space, then keywords
Open an entry in a new tab	⌘/Ctrl plus click, or the card context menu
Rebind keys	open chrome://extensions/shortcuts

Install and Enable

1. Download the project archive and unzip it to a fixed folder
2. Open chrome://extensions/ or edge://extensions/ and switch on Developer mode in the top right
3. Click Load unpacked and select the folder that contains manifest.json directly
4. Pin the icon from the extensions menu, then click it to open the side panel
5. For the full workspace, use the full-screen entry at the top of the side panel; the settings page switches between Chinese and English

Permissions and Data

• Panel and menu: sidePanel and contextMenus provide the side panel and the right-click entry
• Capture and storage: scripting, tabs and activeTab read page information, while storage and unlimitedStorage hold pages and covers
• Scheduled cleanup: alarms drives the periodic cleanup of read items
• Site scope: host_permissions covers all http and https sites
• Data location: pages, projects, reading states and settings remain on the machine, with no account and no upload

Notes

• Protected pages cannot be saved: Chrome internal pages, the extension store and the built-in PDF viewer block injection, so switch to a regular http or https page
• Shortcuts can conflict: if Alt+1 does nothing because the system or another extension took it, rebind it on the extension shortcuts page or use the context menu
• Cleanup range is bounded: the read cleanup accepts 30 to 180 days, and out-of-range input is clamped back into that window
• Deletion is permanent: deleting a project permanently removes its pages after a confirmation step