Memory Hub — Your Second Brain

🧠 Extension + Guide

Memory Hub — Your Second Brain

Recall pages you've visited, filter toxic tone, and get gentle habit + accessibility nudges as you browse.

Get Pro → Install Free on Chrome Web Store →

The Memory Hub popup — search your indexed browsing history at a glance.

Memory Hub — Your Second Brain in the Browser

Recall · Filter · Nurture

Version 1.0 · Updated 2026

Memory Hub is a Chrome extension that turns your browsing history into a personal knowledge base — while also helping you read with better emotional awareness, build micro-habits, and browse more comfortably.

Unlike knowledge-graph tools that ignore how browsing actually feels, or tone/writing tools that ignore your history, Memory Hub is the only extension combining a personal knowledge index with a real-time wellness layer — entirely local, entirely private by default.

What Is Memory Hub?

Memory Hub is a "second brain for Chrome" that:

• Remembers pages you've visited — so you can find them again by selecting text and right-clicking.
• Highlights emotional tone — negative/positive language on the pages you read.
• Nudges you with micro-habits — breathing, gratitude, posture checks.
• Adapts to your needs — dyslexia-friendly, high-contrast, low-sensory reading modes.
• Replaces your new tab — with a daily journal and summary.

Who Should Use Memory Hub?

• Researchers & students — who read dozens of pages and need to reconnect with something they saw days ago.
• Writers & content creators — who want to track the emotional tone of what they're reading.
• Remote workers — who spend hours in Chrome and need micro-break nudges.
• People with dyslexia, light sensitivity, or ADHD — who benefit from custom reading profiles.
• Anyone who's ever said — "I know I read this somewhere, but I can't remember where."

Why You Can Trust Memory Hub

🔒 Trust built in Local-first, private by default, and built with transparency.

Memory Hub stores everything locally on your device. Memory indexing is off until you turn it on, and you can exclude specific sites at any time. We never see your data — there is no Memory Hub server.

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Built from experience

Designed by a team with years of experience in personal knowledge management and browser extensions.

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Proven architecture

Uses battle-tested MV3 patterns: alarms, storage, context menus — no flaky hacks.

🏛️

Verified publisher

Published under a verified Chrome Web Store developer account with a clear privacy policy.

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100% transparent

All code is readable, all data stays local, and we clearly explain every permission we request.

Features at a Glance

🧠 Contextual Memory Recall

Select any text, right-click → "Find Related Memories." Instantly see pages you've visited that match what you're reading.

💭 Emotional Tone Highlights

Paragraphs with negative language get a red left border; positive ones get green. Know the mood of what you're reading at a glance.

🌱 Micro-Habit Prompts

Gentle notifications: "10-second breath: in for 4, hold 4, out for 4." Adjustable frequency (5–60 minutes).

♿ Accessibility Profiles

One-click: dyslexia-friendly font/background, high-contrast, or low-sensory reading mode. Persists across sites.

🌙 Eye-Strain Dark Mode

Real dark mode on any site — not just the ones that support it. Images/video stay natural.

📝 Dream & Mood Journal

New tab page with a daily journal and quick mood entry. Track how you're feeling over time.

Detailed Feature Guide

1. Contextual Memory Recall

how it works Right‑click → Find Related Memories

What it does: Select any text on a page, right-click, and choose "Find Related Memories." Memory Hub searches your indexed browsing history (title + URL) for matches and shows up to 8 results in a floating panel.

Why it matters: Stops you from re‑searching for something you already read. Saves time and mental effort.

algorithm Search Scoring: Each search term is matched against the title and URL of every indexed page. Results are scored by term overlap and sorted by score, then by recency.

// Simplified scoring logic const terms = query.toLowerCase().split(/\s+/); const score = terms.reduce((acc, t) => acc + (hay.includes(t) ? 1 : 0), 0); // Sort by score desc, then by visitedAt desc

Worked example
You're reading an article about "neural networks." You right-click "neural networks" → Memory Hub shows you 3 pages from last week that also mention these terms, including a PDF you forgot you'd opened.

2. Emotional Tone Highlights

how it works Automated sentiment analysis

What it does: Scans paragraphs on the page for negative or positive language using a bundled keyword lexicon. Negative paragraphs get a red left border; positive ones get green.

Why it matters: Helps you read with greater emotional awareness — especially useful for news, social media, or emotionally charged content.

lexicon Keyword Sets: The MVP uses a small but curated list of negative/positive words. For better accuracy, you can bring your own API key (Pro feature).

// Excerpt from TONE_LEXICON negative: ['hate', 'terrible', 'awful', 'worse', 'worst', 'disgusting', 'horrible'], positive: ['love', 'wonderful', 'great', 'amazing', 'excellent', 'fantastic', 'brilliant']

⚠️ Important The lexicon-based approach is a best-effort heuristic — it will catch obvious cases but miss nuance. For real accuracy, consider connecting a third-party model via the Options page.

3. Micro-Habit Prompts

how it works Gentle notifications at your chosen interval

What it does: Shows a random micro-habit notification at a frequency you set (default: 20 minutes). Prompts include breathing exercises, posture checks, and gratitude nudges.

Why it matters: Regular micro-breaks reduce eye strain, improve focus, and build positive habits without breaking flow.

technology Uses chrome.alarms (minimum 5-minute interval) because the service worker is non-persistent.

Example prompts:
• "10-second breath: in for 4, hold 4, out for 4."
• "Unclench your jaw and drop your shoulders."
• "Name one thing that went well today."
• "Look at something 20 feet away for 20 seconds."

4. Accessibility Profiles

how it works One-click, site-wide CSS toggles

What it does: Applies dyslexia-friendly, high-contrast, or low-sensory reading mode to any page you visit. The setting persists across tabs and sessions.

Why it matters: Makes the web more readable for people with dyslexia, visual impairments, or sensory overload.

profiles

• Dyslexia: Adjusted font, background, and spacing for easier reading.
• High Contrast: Increased contrast ratio for better visibility.
• Low Sensory: Reduced motion, simplified colors, and less visual clutter.

5. Eye-Strain Dark Mode

how it works CSS invert + hue-rotate with re-inversion for media

What it does: Applies a dark-mode filter to any site, with images, videos, and canvas elements re-inverted so they look natural.

Why it matters: Dark mode reduces eye strain in low-light environments — and not all sites support it natively.

6. Dream & Mood Journal

how it works New tab page replacement

What it does: Replaces Chrome's default new tab with a daily journal and quick mood entry. Mood entries are timestamped and stored in moodEntries; journal entries go into journalEntries.

Why it matters: Creates a simple, consistent space for reflection — and keeps it separate from your browsing memory so the two don't blur together.

Setup & Configuration

Turning On Memory Indexing

1. Click the Memory Hub icon in your toolbar → open the popup.
2. Click the Settings icon (⚙️) or go to chrome://extensions → Memory Hub → Options.
3. Under Data & Privacy, toggle "Enable memory indexing" on.
4. (Optional) Add domains to the exclusion list — pages on those sites won't be indexed.

🔒 Privacy note Indexing is off by default. Only pages visited after you turn it on are recorded. No history is read from Chrome's built-in history API.

Connecting an API Key (Optional)

1. Open the Options page.
2. Scroll to the Real-Time Data API Key section.
3. Paste your API key from a supported provider (e.g., Perspective API, OpenAI, Anthropic, Cohere, Hugging Face).
4. Click Save.

🔒 Privacy note Your API key is stored locally and never sent to Memory Hub servers. API calls go directly from your browser to the provider.

License (Pro)

1. Open the Options page.
2. In the License section, paste your Gumroad license key from muhiuddinalam.gumroad.com/l/memoryhub.
3. Click Verify.
4. If valid, Pro features unlock immediately.

grace period If Gumroad is temporarily unreachable, Pro features stay on for up to 14 days — so you're never locked out due to a network hiccup.

Pricing: Free vs. Pro

Free — forever $0

• Contextual Memory Recall (local)
• Tone Highlights (lexicon-based)
• Micro-Habit Prompts
• Accessibility Profiles
• Eye-Strain Dark Mode
• Dream & Mood Journal
• Up to 5,000 indexed memories

Pro Monthly $12/month

• Everything in Free
• Unlimited memories
• AI-powered tone analysis (bring your own key)
• Mind maps & visual knowledge graphs
• Advanced mood dashboards & habit streaks
• Encrypted cross-device sync
• AI summaries of your reading history
• Priority support

Pro Annual $99/year

• Everything in Monthly Pro
• Save $45/year vs. monthly
• Same great features
• Priority support

Best value

One Pro subscription covers all features. Get your license at muhiuddinalam.gumroad.com/l/memoryhub.

Common Mistakes & How to Avoid Them

Mistake: Expecting instant recall of pages visited before indexing was turned on.
Fix: Memory Hub only indexes pages visited after you enable the setting. Turn it on now, and it'll build up over time.

Mistake: Thinking the tone overlay is 100% accurate.
Fix: The lexicon-based approach is a heuristic — it catches obvious sentiment but misses nuance. For better accuracy, connect a real model via your own API key (Pro).

Mistake: Setting the habit prompt interval too short.
Fix: The minimum is 5 minutes. A 15–30 minute interval is recommended to avoid notification fatigue.

• ⚠️ Indexing exclusions: Add domains you don't want indexed (e.g., private work tools, banking sites).
• ⚠️ API key security: Your key is stored locally — never paste it anywhere else.
• ⚠️ License verification: If you see "grace" status, the extension couldn't reach Gumroad — Pro stays on for 14 days while connectivity is restored.

Frequently Asked Questions

Does Memory Hub read my browser history?

No. Memory Hub does not use Chrome's built-in history API. It only indexes pages you visit after you turn indexing on, and it stores them locally in chrome.storage.local. Your full browsing history is never accessed.

Where is my data stored?

100% locally on your device, in chrome.storage.local. No data is sent to any server (except optional third-party API calls you explicitly configure, and Gumroad license verification).

Can I use Memory Hub offline?

Yes. All core features (memory recall, tone highlighting, accessibility profiles, dark mode, habit prompts) work entirely offline. API-based features (AI tone analysis) require internet.

What happens if I uninstall the extension?

All data (memories, mood/journal entries, settings) is removed from your browser. If you have a Pro license, you can re-enter your key after reinstalling to restore access.

How accurate is the tone analysis?

The built-in lexicon is ~60–70% accurate for obvious sentiment. For higher accuracy, you can connect a third-party API (Perspective, OpenAI, Anthropic, etc.) using your own key — that moves accuracy closer to 85–95% depending on the model.

Can I use Memory Hub on any site?

Yes — Memory Hub works on every page you visit (with <all_urls> permission). Memory recall, tone highlights, accessibility profiles, and dark mode all work everywhere.

Ready to build your second brain?

Free forever · Pro from $12/month · 14-day free trial

Get Memory Hub Pro → Install Free on Chrome Web Store →

Memory Hub · Version 1.0 · Built with ❤️ for Chrome · Privacy Policy · Contact Me