These Weeks in Firefox: Issue 29 – Firefox Nightly News

Highlights

• Check out the blog post on hacks.mozilla.org on using the new theming API in Firefox
  • 

    Modding the appearance of the browser should be this easy.

• evanxd added a spotlight feature to Preferences so that it’s easier for “help” links to highlight relevant things!
  • 

    This is where you go when you click on the “Configure” button in the DRM permission popup.

  • Here’s the UX spec in case the above description isn’t clear enough
• OMTP (Off-main-thread-painting) should be shipping to release in Firefox 58. Here’s a blog post explaining what it is and why it’s great!
• A highly requested Screenshots feature is now in Nightly: Added the ability to copy the image to the clipboard in addition to the other choices of uploading or saving.
• A group of students at MSU have finished working on the Browser Screenshots testing suite for their Capstone course.
  • Here’s their presentation video

Friends of the Firefox team

• Resolved bugs (excluding employees): https://mzl.la/2je7cZF
  • More than one bug fixed:
    • Ryan Leake
    • Tim Nguyen :ntim
    • Tushar Arora
  • New contributors (🌟 = First Patch!)
    • 86ecce74 flattened some excessive inheritance, which got rid of another XBL binding. It’s great to see the XBL binding count go down!
    • 🌟 Andrej Gorovoj cleaned up some element IDs in our prompting code.
    • 🌟 Oliver Alonzo fixed a bug where right-clicks in about:preferences were interpreted as left-clicks.
    • 🌟 Sean Prashad fixed some SASS linting errors in Activity Stream
    • 🌟 Tushar Arora made the tabs.query WebExtension API support regular expression patterns, and also made it so that WebExtensions can clear title prefaces with the empty string

Project Updates

Add-ons

• The theme API now has support for setting the urlbar and searchbar border color.
• A message is now displayed on about:preferences after a user disables an extension reminding them how to re-enable it.
• Calling tabs.create without a windowId will now target only non-popup windows.
• browserSettings APIs were added for controlling the options to open bookmarks in new tabs and to open search results in new tabs.
• Tabs.query now does pattern matching on the title.
• Read-only browserSettings now return false when calling set or clear and also report an accurate levelofControl.
• “Scrollbars” has been added to window features for windows created via identity.launchWebAuthFlow.
• The pref for ui.context_menus.after_mouseup has also been exposed to extensions via the browserSettings API.
• The user is now notified the first time they visit the new tab page if an extension is controlling it.

Activity Stream

Browser Architecture

• Sync and Storage roadmap proposal successfully passed review

Form Autofill

• Improved the accuracy of identifying fields related to credit card expiration date.
• Fixed an issue that the cached “searchString” in the autocomplete module isn’t consistent with the actual value in the input element.
• Heartbeat for credit card autofill is live.

• If you use `git mozreview push`, then lint should run automatically against the files in your push.
  • You may need to run `./mach mercurial-setup` to pick up the latest version-control-tools.
• Requiring the use of Services.jsm rather than .getService continues to roll out, all of toolkit/ & services/ now covered, browser/ is on its way.

Mobile

• Firefox for Android can be used as an “Assist App” again! This means that long pressing the home button launches Firefox with a new tab ready for typing a search query or URL.
  • This feature was temporarily lost when the Search Activity / Widget was removed in Firefox for Android 58, and should be fixed in Firefox for Android 59

Performance

• Tab warming has landed, but is disabled by default
  • There is a bug where links that are opened in new tabs sometimes show perma-spinners with warming enabled, so haven’t yet enabled by default.
  • There’s another, harder-to-hit bug where permanent spinners can be presented to the user after closing tabs. This doesn’t require warming to be enabled, and is marked as a regression.
  • There’s also a Talos regression being investigated. Hooray!
  • Pref: browser.tabs.remote.warmup.enabled
    • There’s a reason this isn’t yet enabled on Nightly though. Expect perma-spinners until the blockers for this bug are fixed
• Patches are up to make FormHistory.jsm use Sqlite.jsm instead of mozIStorageService, which allows us to avoid some main-thread IO when FormHistory is first accessed.
• We now have automated tests to prevent flickering regressions during startup and when opening new windows.

Platform Audibles

• samael made it so that nsBrowserStatusFilter::OnStateChange only gets STATE_IS_NETWORK updates.
• Tommy Kuo is moving <select> dropdown rendering into the content process. This should re-enable a bunch of styling capabilities, and greatly improve performance and responsiveness for dropdowns with many items
  • The plan is to retain the OS native styling unless overridden by content
• billm is removing the Add-on Interposition Service, a.k.a. “transparent CPOWs for legacy multiprocess-incompatible add-ons”
• WebRender is going to make tab switching even faster

Privacy/Security

• The official Firefox Multi-Account Containers extension has passed 100k downloads on AMO.
• nsIPermissionRequest now includes an isHandlingUserInput field to easily see whether the prompt comes from a user action.
• We’re starting a project to improve the user experience around site data (including cookies and cache) management. You can follow along here. Also thinking about how we can de-duplicate code that does data sanitization for users.
• Heads up: The definition of window.isSecureContext has changed to not consider the window opener anymore.

Search and Navigation

Address Bar & Search

• The Address Bar now freezes an ongoing search when the selection is changed through the keyboard, to avoid surprising the user by moving matches around
• With the update to Firefox 57.0.1, some users may experience a search reset. If they had their default a search plugin installed before Firefox 45 or installed by a legacy add-on, it will be silently reset to the default engine of their region. Users who are more likely to have customized the engine will see a prompt offering an easy one click way to keep the current default.
• Fixed some very frequent intermittent failures in browser_ext_omnibox.js

Places

• :Kit made Sqlite.jsm copy over temp entities when creating a writable clone of a connection

Test Pilot

• Check out our recent blog posts on updates to the Notes experiment and on usage of react-storybook on the Test Pilot website
• Screenshots updates:
  • Highly requested feature now in Nightly: Added the ability to copy the image to the clipboard in addition to the other choices of uploading or saving.
  • Tracking Firefox changes needed to become a pure WebExtension in bug 1422437
  • Features coming soon: annotations (draw on your shots) and FxA integration
  • A/B testing on two small website features shipping soon

Web Payments

• Making progress on the dialog and use of Custom Elements for implementing the dialog and UI components within it
• Continuing refinement on UX specs

Here are the raw meeting notes that were used to derive this list.

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