Privacy/Features/Limit CSS3 resolution
Status
| Limit CSS3 resolution and window.screen info to render window size | |
| Stage | Draft |
| Status | ` |
| Release target | ` |
| Health | OK |
| Status note | ` |
Team
| Product manager | Sid Stamm |
| Directly Responsible Individual | ` |
| Lead engineer | ` |
| Security lead | ` |
| Privacy lead | ` |
| Localization lead | ` |
| Accessibility lead | ` |
| QA lead | ` |
| UX lead | ` |
| Product marketing lead | ` |
| Operations lead | ` |
| Additional members | ` |
Open issues/risks
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Stage 1: Definition
1. Feature overview
Several projects inlcuding the EFF's panoptclick and Tor (https://trac.torproject.org/projects/tor/ticket/2875) have notices that both desktop resolution can be used to fingerprint users.
There are two issues here: information leaked via Javascript and information leaked via CSS media queries.
2. Users & use cases
-Privacy Enhancing Addons such as the Tor button -web developes testing the behavior of their websites on different platforms
3. Dependencies
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4. Requirements
-CSS properties must not reveal browser side.
Non-goals
-No need to touch Javascript related functions/attributes as these can be handled by the capabilities code.
Stage 2: Design
5. Functional specification
Add a preference to to hide css device information (disabled by default)
When this preference is enabled CSS devuce queries should return the window values instead.
6. User experience design
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Stage 3: Planning
7. Implementation plan
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8. Reviews
Security review
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Privacy review
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Localization review
No Need?
Accessibility
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Quality Assurance review
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Operations review
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Stage 4: Development
9. Implementation
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Stage 5: Release
10. Landing criteria
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Feature details
| Priority | P1 |
| Rank | 999 |
| Theme / Goal | Advancing Anonymity |
| Roadmap | Privacy |
| Secondary roadmap | ` |
| Feature list | Platform |
| Project | ` |
| Engineering team | ` |
Team status notes
| status | notes | |
| Products | ` | ` |
| Engineering | ` | ` |
| Security | ` | ` |
| Privacy | ` | ` |
| Localization | ` | ` |
| Accessibility | ` | ` |
| Quality assurance | ` | ` |
| User experience | ` | ` |
| Product marketing | ` | ` |
| Operations | ` | ` |
