Browser Extensions (Chrome & Microsoft Edge)
Fill web forms directly in your browser with one-click autofill and profile integration
Overview
The Instafill.ai browser extensions bring powerful form-filling capabilities directly into your web browser, enabling you to auto-fill web forms with saved profile data, extract data from open tabs to fill other forms, and seamlessly integrate PDF form filling with web-based workflows. Instead of switching between browser and Instafill.ai platform, the extensions provide inline form filling tools, profile selection, and instant access to your form library right in your browser toolbar.
This is particularly useful for online applications, web-based government portals, SaaS form submissions, job applications through applicant tracking systems, or any web form where you need to enter the same information repeatedly. The extensions sync with your Instafill.ai account, giving you access to all profiles, sources, and form data from within the browser.
Browser Support
Instafill.ai extensions are available for both Google Chrome and Microsoft Edge:
Google Chrome Extension:
- Install from Chrome Web Store
- Works on Chrome version 90+
- Compatible with Chromebook devices
- Install Chrome Extension →
Microsoft Edge Extension:
- Install from Microsoft Edge Add-ons
- Works on Edge version 90+ (Chromium-based Edge)
- Compatible with Windows, macOS, and Linux
- Install Edge Extension →
Identical Functionality: Both extensions offer the same features, capabilities, and user experience. Choose based on your preferred browser.
Technical Note: Since Microsoft Edge is built on Chromium (same engine as Chrome), the extension architecture is identical across both browsers. Any feature available in Chrome is also available in Edge.
Key Capabilities
- One-Click Autofill: Fill web forms instantly with saved profiles
- Profile Selection: Choose which profile to use from dropdown
- Context Detection: Extension detects fillable forms on page
- Field Mapping: Intelligent mapping of profile data to web form fields
- Multi-Page Forms: Maintain session across multi-page form workflows
- Data Extraction: Extract data from current page to fill other forms
- PDF Download: Fill PDF forms and download directly from browser
- Login Integration: Stay logged in to Instafill.ai account
- Keyboard Shortcuts: Quick access with customizable hotkeys
- Privacy Mode: Optional private browsing mode for sensitive forms
How It Works
Installation:
- Chrome: Install from Chrome Web Store
- Edge: Install from Microsoft Edge Add-ons
- Click extension icon → "Log in with Instafill.ai"
- Authenticate with your Instafill.ai credentials
- Extension syncs with your profiles and settings
Web Form Detection:
- Visit web page with form (job application, account signup, etc.)
- Extension icon highlights: "Form detected on this page"
- Click extension icon to open panel
Profile Selection:
- Extension panel shows: "Select profile for autofill"
- Dropdown lists your saved profiles: "Personal", "Professional", "Client: ABC Corp"
- Select appropriate profile
Autofill:
- Click "Autofill with [Profile Name]"
- Extension maps profile data to form fields
- Form filled in 1-2 seconds
- Review: Fields highlighted (green = filled, yellow = needs review)
Manual Adjustments:
- Edit any field that needs customization
- Add info not in profile (job-specific questions, etc.)
- Submit form when ready
Use Cases
The browser extension is most valuable for anyone filling the same type of form across many different websites. Job seekers autofill contact details, work history, and education into any company's career portal in seconds, while sales reps populate CRM records directly from client documents without manually re-keying data between systems.
Benefits
- Browser-Native: Fill web forms without leaving browser
- Time Savings: Autofill forms in seconds instead of minutes
- Accuracy: Consistent data from profiles, no typos
- Convenience: Access all profiles and features without platform switching
- Multi-Form Support: Works with any web form (HTML forms, custom fields)
- Seamless Integration: Syncs with Instafill.ai platform automatically
- Privacy: No data stored in browser - all profile data encrypted on servers
Security & Privacy
Extension security features:
Authentication:
- Secure OAuth login (no passwords stored in extension)
- Session tokens encrypted and auto-expire
- Re-authentication required every 30 days
Data Handling:
- Profiles fetched on-demand (not cached in browser)
- No profile data persists after browser close
- HTTPS for all API communication
Permissions:
- Extension requests minimal permissions:
- "Active Tab": Read form fields on current tab (only)
- "Storage": Store OAuth token securely
- "Identity": OAuth authentication
- Does NOT request:
- "All Sites": Extension cannot read data from other tabs
- "Browsing History": No tracking of visited sites
Private Browsing:
- Extension available in Incognito mode (opt-in)
- No profile data cached in Incognito
- Session cleared on Incognito close
User Control:
- Enable/disable extension per site
- Blacklist specific domains (banking sites, etc.)
- Clear extension data anytime
Workspace Isolation:
- All profile and session data accessed by the extension is scoped to
workspaceIdand protected via the shared JWT authentication middleware running in both the .NET and Python service layers - Extension cannot access data from a different workspace even when logged in to the same account
Common Questions
Does the extension work on all websites?
Compatibility overview:
Fully Supported (100% functionality):
- Standard HTML forms (90% of web forms)
- Common frameworks: React, Vue, Angular forms
- Most SaaS platforms: Salesforce, HubSpot, Workday
- Government portals: Federal, state, local applications
- Education portals: Common App, university applications
Partially Supported (May require adjustments):
- Heavily customized forms with non-standard fields
- Single-page applications with dynamic field loading
- Forms using Shadow DOM
Limitations:
- CAPTCHA fields (must complete manually)
- File upload fields (manual upload required)
- Canvas-based forms (rare, non-standard)
Testing: Try extension on form - works for vast majority. If issues, fill via Instafill.ai platform instead.
Feedback: Report sites where extension doesn't work - helps improve compatibility.
Can I use the extension for confidential forms?
Yes, with security considerations:
Privacy Mode:
- Enable "Privacy Mode" in extension settings
- In Privacy Mode:
- Profile data fetched only when explicitly requested
- No automatic form detection
- Session data cleared immediately after form fill
- No logs retained
Recommended Use:
- General forms: Normal mode (convenient)
- Confidential forms: Privacy mode (more secure)
- Banking/medical: Consider filling via platform (not extension) for maximum security
What Extension Can Access:
- Current tab only (not other tabs)
- Only when you click extension icon
- Cannot read data from inactive tabs
What Extension Cannot Access:
- Passwords (never fill password fields)
- Payment information (credit cards, bank accounts)
- Files on your computer
- Other browser tabs or windows
Domain Blacklist:
- Add domains to blacklist: Extension disabled on those sites
- Example: Blacklist banking domains for peace of mind
- Extension won't activate on blacklisted sites
Best Practice: Use platform (not extension) for forms requiring highest security (medical, financial).
What happens if I'm logged out of the extension?
Session management:
Automatic Logout:
- After 30 days of inactivity
- If you change Instafill.ai password
- If you explicitly log out
When Logged Out:
- Extension icon grayed out
- Click icon → "Log in to Instafill.ai" prompt
- Quick re-login (OAuth, 2 clicks)
Data Preservation:
- No data lost (profiles stored on server, not in extension)
- After re-login, all profiles immediately available
Login Methods:
- Google OAuth
- Microsoft OAuth
- Email + password
- SSO (Enterprise)
Offline Behavior:
- Extension requires internet to fetch profiles
- If offline: "Connect to internet to use Instafill.ai extension"
- Local caching planned for future (offline profile access)
Multiple Devices:
- Log in on work computer and home computer simultaneously
- Profiles sync across devices
- Actions on one device immediately reflected on others
Can I create new profiles from the extension?
Yes! Profile management in extension:
Create Profile:
- Click extension icon
- Select "Manage Profiles"
- Click "New Profile"
- Fill profile fields in popup
- Save → Profile immediately available
Edit Profile:
- Manage Profiles → Select profile
- Edit fields
- Save → Changes sync to platform
Quick Profile from Form:
- Fill web form manually
- Click extension → "Save as Profile"
- Extension extracts filled data
- Name profile
- Save → New profile created from form data
Use Case: Fill first job application manually, save as "Job Application" profile, use for remaining 19 applications.
Platform Sync:
- Profiles created in extension immediately available on platform
- Profiles created on platform immediately available in extension
- Two-way sync ensures consistency
Limitations:
- Complex profiles (with tables, nested data) easier to create on platform
- Extension best for simple profiles (15-20 fields)
Does the extension slow down my browser?
Performance optimization:
Resource Usage:
- Extension runs only when explicitly triggered
- Idle state: <1 MB memory, 0% CPU
- Active state: 5-10 MB memory, <5% CPU (brief spike during autofill)
- No background processes when not in use
Page Load Impact:
- Zero impact on page load speed
- Extension loads asynchronously after page ready
- No scripts injected until extension icon clicked
Form Detection:
- Lightweight scan when page loads (1-2ms)
- Only identifies if form present (no data processing)
- No impact on page rendering
Comparison:
- Lighter than ad blockers (5x less resource usage)
- Similar footprint to password managers
- Much lighter than productivity extensions (Grammarly, etc.)
Performance Monitoring:
- Chrome Task Manager: Check "Instafill.ai Extension" resource usage
- Typically shows <10 MB, even during active use
No Performance Complaints: 50,000+ active users, no reported performance issues.
Best Practice: If concerned, disable extension when not needed, enable when filling forms.