A powerful Chrome extension that automates your study routine and brings intelligent focus tools directly to your browser.
Version 3.8.0 · Manifest V3 · Author Mahmud Nibir
| Feature | Description |
|---|---|
| Speed Control | Playback speed from 0.25× to 20× via slider |
| Speed Presets | Quick-access 1.25×, 1.5×, 1.75×, 2× buttons in the Advanced tab |
| Universal Video Speed | Hover overlay on any video across the entire web — toggle in settings |
| Bookmarks | Cloud-synced video timestamps with labels, import & export as JSON |
| Ad Skip | Automatically skips YouTube advertisements |
| SponsorBlock | Auto-skip sponsor segments via community data |
| Content Filters | Hide comments, shorts, description, or suggested videos |
| Focus Mode | Hides the sidebar navigation while watching to reduce distractions |
| Auto Theater Mode | Automatically switches to theater view on video load |
| Auto Fullscreen | Automatically enters fullscreen when playback starts |
| Default Volume | Enforce a set volume level on every video load |
| Auto Subtitles | Automatically enable closed captions on video load |
| Sleep Timer | Pause playback after a set number of minutes |
| Screen Time Limits | Daily watch-time cap with a warning and auto-pause |
| Watch Statistics | Track total watch time and session history with a live graph (Y-axis labels, daily/weekly breakdown) across YouTube, Instagram, and Facebook; last-selected platform tab is remembered |
| Social Download | One-click video download overlay on Instagram and Facebook posts |
| Hide Messenger | Remove the Facebook Messenger chat bubble and chat panel with a single toggle; updates the page instantly without a reload |
| Loop Segment (A→B) | Set A and B loop points with [ / ] keys; the video continuously repeats the marked section. Clear with \ or the popup button |
| Timestamp Share Links | Copy a shareable YouTube URL at the exact timestamp of any bookmark directly from the bookmarks panel; links open at that precise moment |
| Watched Progress Tags | Automatic red progress bars on video thumbnails for partially-watched videos; progress is silently tracked every 5 seconds |
| Keyboard Shortcuts | Fully customizable hotkeys for all controls |
| Voice Modes | 8 real-time audio modes: Normal, Chipmunk, Pikachu, Naruto, Doraemon, Bass Boost, Robot, Echo |
| Feature Guide | In-popup ? button opens a scrollable guide listing all setting descriptions grouped by section |
- Clone or download this repository
- Open Chrome and navigate to
chrome://extensions - Enable Developer mode (top-right toggle)
- Click Load unpacked and select the project folder
| Permission | Reason |
|---|---|
storage |
Persist bookmarks, settings, and statistics |
activeTab |
Interact with the active YouTube tab |
scripting |
Inject controls into the YouTube player |
Click the Cognify extension icon on any supported page to open the control panel. All settings persist across sessions via Chrome's sync storage. The Advanced tab contains automation toggles (theater, fullscreen, subtitles, focus mode), playback presets, bookmark import/export, and statistics management.
MIT © Mahmud Nibir