Features/Desktop/Expose prefs for tabs-on-demand

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Expose prefs for tabs-on-demand
Stage Landed
Status Complete
Release target Firefox 8
Health OK
Status note `


Product manager Asa Dotzler
Directly Responsible Individual Alex Limi
Lead engineer Paul O'Shannessy
Security lead `
Privacy lead `
Localization lead `
Accessibility lead `
QA lead Mihaela Velimiroviciu
UX lead `
Product marketing lead `
Operations lead `
Additional members `

Open issues/risks

  • Talk to Paul about estimates & tracking
  • There are cases where you want all tabs to load in the background. We'd like to expose the preference to enable the old behavior for the people that prefer this.

Stage 1: Definition

1. Feature overview

Firefox 4 has the hidden ability to load tabs on-demand by setting the maximum number of concurrent tabs being restored to "0" — now that the feature has been in the wild for a while, we'd like to expose it as the default behavior for session restore. It makes startup a lot faster, and uses a lot less memory.

This feature falls primarily in the Experience category (from the "Discover, Experience, and Connect" vision statement.)

2. Users & use cases


3. Dependencies


4. Requirements

  • Ability to toggle on-demand loading of tabs.



Stage 2: Design

5. Functional specification


6. User experience design

When you select "Show my windows and tabs from last time" in Prefs -> General, we should show an indented checkbox "Load on demand" that toggles this setting. This should be enabled by default.

Stage 3: Planning

7. Implementation plan


8. Reviews

Security review


Privacy review


Localization review




Quality Assurance review


Operations review


Stage 4: Development

9. Implementation

Stage 5: Release

10. Landing criteria


Feature details

Priority P2
Rank 999
Theme / Goal `
Roadmap Firefox Desktop
Secondary roadmap `
Feature list Desktop
Project `
Engineering team Desktop front-end

Team status notes

  status notes
Products ` `
Engineering ` `
Security sec-review-unnecessary `
Privacy ` `
Localization ` `
Accessibility ` `
Quality assurance Signed Off Test Plan
User experience ` `
Product marketing ` `
Operations ` `