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David Harbage

PROFILE

David Harbage

Dave contributed to the duckduckgo/privacy-configuration and duckduckgo/content-scope-scripts repositories, focusing on privacy feature development and configuration management. Over 11 months, he delivered and maintained element hiding rules, tracker allowlists, and scriptlet-based interventions to enhance user privacy and site compatibility. Using JavaScript, TypeScript, and JSON, Dave implemented declarative configuration updates, cross-platform script control, and UI/UX refinements, addressing both feature enhancements and bug fixes. His work included managing feature rollouts, debugging browser extension behaviors, and ensuring policy alignment. The depth of his contributions is reflected in disciplined commit practices, cross-repo collaboration, and a strong emphasis on maintainability and privacy engineering.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

37Total
Bugs
6
Commits
37
Features
16
Lines of code
4,193
Activity Months11

Work History

September 2025

3 Commits • 1 Features

Sep 1, 2025

September 2025 Monthly Summary Key features delivered: - Privacy: Element Hiding Rules Refinement in duckduckgo/privacy-configuration. Updated element-hiding.json to strengthen protections, with commits 446e534bade96eb0343f595db990b1b6571e2e1b and 54196105ec86897cb6c38acf579f7cb35b175e43. - Bug fix: Prevent duplicate style tag injection in SPAs in duckduckgo/content-scope-scripts. Introduced styleTagInjected flag to avoid multiple injections during SPA navigations. Commit: 3f1a9b87a3a1d7881a7f286c761b6ce70d3740ea. Major bugs fixed: - Resolved the duplicate style tag injection issue in SPAs, reducing DOM churn and mitigating styling conflicts during page transitions. Overall impact and accomplishments: - Improved stability and user experience for SPA navigation due to reduced DOM mutations and consistent styling. - Strengthened privacy posture via refined element hiding configurations across two repos, contributing to a stronger baseline protection. - Demonstrated cross-repo collaboration with precise, traceable commits, aligning with product reliability and privacy goals. Technologies/skills demonstrated: - JavaScript DOM manipulation and state management (styleTagInjected) - JSON configuration management and privacy rule refinement - Cross-repo collaboration and disciplined commit history (JS/JSON focus, SPA patterns, privacy controls)

August 2025

3 Commits • 2 Features

Aug 1, 2025

August 2025: Focused on policy-aligned privacy configuration and removing intrusive features to improve user trust and stability. Delivered updates to privacy settings, rolled back the pop-under experiment, and reverted the scriptlets feature across two repositories, resulting in a cleaner baseline and reduced risk.

July 2025

3 Commits • 1 Features

Jul 1, 2025

July 2025 performance summary for the duckduckgo/privacy-configuration repository. Delivered UI cleanup and an experimental blocking feature with controlled rollout, improving user privacy controls and enabling safer feature experimentation across platforms. This work enhances usability, reduces interface noise, and sets up a framework for data-driven iteration in privacy configurations.

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025 monthly summary focusing on delivering Scriptlets integration for Web Interventions in the duckduckgo/content-scope-scripts repository. The work introduces a submodule-based Scriptlets feature (AdGuard Scriptlets) that enables cookie manipulation, localStorage updates, and prevention of certain script behaviors across platforms, including Apple devices. Delivery aligns with privacy and script-control goals while establishing a maintainable workflow for future Scriptlets updates.

April 2025

2 Commits • 1 Features

Apr 1, 2025

April 2025: Privacy Configuration Maintenance delivered for the duckduckgo/privacy-configuration repository. Updated tracker allowlist and Global Privacy Control (GPC) policy configurations to stay current with evolving tracking practices, reducing policy drift and strengthening user protections. Commits included: - e4b4bc71952ebed97808e4fd6545945c44f0b10f: Update tracker-allowlist.json (#3006) - 53d20d5437292db9f074213a1f38ea807ee050d2: Update gpc.json (#3053)

March 2025

4 Commits • 1 Features

Mar 1, 2025

March 2025 monthly summary for the duckduckgo/privacy-configuration repository. Delivered two targeted updates focused on privacy workflow stability and user experience: 1) Tracker allowlist stability and adblock race-condition bug fix, and 2) Ad content and empty ad spaces improvement. These changes reduce site breakage, improve privacy protections, and tidy UI by removing empty ad spaces. Overall, the work enhances reliability of privacy configurations, supports smoother user experiences, and demonstrates careful code quality practices (linting) in configuration updates.

February 2025

3 Commits • 1 Features

Feb 1, 2025

February 2025 — duckduckgo/privacy-configuration Key features delivered: - Android Privacy Configuration Update: updated android-override.json to enhance privacy configurations and tracking protection on Android. (commit bc6a387a52beca7b6258d21f29d1e55dcb2be0d8) Major bugs fixed: - Chrome Extension UX Fixes: resolved disruptive Chrome popup on Google Drive. (commit bb107cc19fd7fb8a9f3c73f67aa5407f6c09c1bb) - Chrome Extension UX Fixes: corrected excessive empty space above the navigation bar on abcnews site. (commit a260a4b82b3e753accd5da41917a0f6abd55d5fb) Overall impact and accomplishments: - Improved end-user UX and reliability of the privacy extension across major sites, reducing disruption and layout issues. - Strengthened Android privacy protections via configuration updates. - Demonstrated end-to-end ownership from UX debugging to JSON-driven privacy policy updates; improved stability and maintainability of the repository. Technologies/skills demonstrated: - Chrome Extensions, web extension UX debugging, JSON configuration management, version control (Git), cross-site QA.

January 2025

4 Commits • 1 Features

Jan 1, 2025

Month: 2025-01 — Privacy configuration work in duckduckgo/privacy-configuration focused on expanding and stabilizing element hiding rules across regions. Key feature delivered: Enhanced Element Hiding Rules for Privacy, consolidating and expanding element-hiding.json to cover new Google popup elements and international domains for Google and eBay. This work is backed by four commits updating the rules and JSON consumed by the UI to ensure consistent privacy controls.

December 2024

7 Commits • 3 Features

Dec 1, 2024

December 2024 monthly highlights for duckduckgo/privacy-configuration: delivered updates to privacy configuration policies, maintained blocking efficacy, and improved compatibility with evolving browser behavior. Focused on policy alignment, tracker allowlists, and site-specific element hiding to preserve user privacy and product reliability amid browser changes.

November 2024

5 Commits • 3 Features

Nov 1, 2024

November 2024 (Month: 2024-11) focused on privacy-configuration feature work to strengthen blocking rules, improve user experience, and keep policy alignment. Delivered three feature enhancements via repository duckduckgo/privacy-configuration with targeted configuration changes, validated through commit-based changes and release hygiene.

October 2024

2 Commits • 1 Features

Oct 1, 2024

October 2024: Delivered privacy configuration updates for the duckduckgo/privacy-configuration repository, strengthening user privacy protections and refining consent management. Implemented updates to the tracker allowlist to block more trackers and adjusted autoconsent settings to improve how user consent is captured and applied. All work is tracked via explicit commits for traceability. No major bugs reported in this period, with a focus on configuration quality and release readiness.

Activity

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Quality Metrics

Correctness92.2%
Maintainability92.0%
Architecture86.8%
Performance87.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

CSSJSONJavaScriptPerlTypeScript

Technical Skills

Ad BlockingBrowser Extension DevelopmentBrowser ExtensionsCSS StylingConfiguration ManagementContent SecurityData ManagementDeclarative ConfigurationESLintElement HidingFeature FlaggingFeature ImplementationFront End DevelopmentFront-end DevelopmentFull Stack Development

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

duckduckgo/privacy-configuration

Oct 2024 Sep 2025
10 Months active

Languages Used

JSONJavaScriptCSSPerlTypeScript

Technical Skills

Configuration ManagementPrivacy Configuration ManagementPrivacy ConfigurationAd BlockingBrowser ExtensionsData Management

duckduckgo/content-scope-scripts

Jun 2025 Sep 2025
3 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

Content SecurityFeature ImplementationJavaScriptTypeScriptWeb DevelopmentESLint

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