The Joy of Coding: Episode Guide

Volunteer-driven episode guide for The Joy of Coding

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Episode 439: May 6th, 2026

Links

• Watch this episode on Air Mozilla
• Joplin Agenda

Topics

• Q: “missed the submission window, so here is my question again: There was a regression on 10th April 2026 breaking the functionality of middle clicking the “Go to the address in Location Bar” arrow button to open the address in a new tab.

  however the bug mozregession provides is not public, and it’s title does not make sense related to the regression:

  2026-04-14T18:40:43.437000: INFO : Narrowed integration regression window from [aee77767, 602084a8] (4 builds) to [e41f1f9a, 602084a8] (2 builds) (~1 steps left) 2026-04-14T18:40:43.473000: DEBUG : Starting merge handling… 2026-04-14T18:40:43.476000: DEBUG : Using url: https://hg.mozilla.org/integration/autoland/json-pushes?changeset=602084a80545c3aa2879ec54585f298966b00839&full=1 2026-04-14T18:40:43.480000: DEBUG : redo: attempt 1/3 2026-04-14T18:40:43.482000: DEBUG : redo: retry: calling _default_get with args: (‘https://hg.mozilla.org/integration/autoland/json-pushes?changeset=602084a80545c3aa2879ec54585f298966b00839&full=1’,), kwargs: {}, attempt #1 2026-04-14T18:40:43.488000: DEBUG : urllib3.connectionpool: Resetting dropped connection: hg.mozilla.org 2026-04-14T18:40:44.270000: DEBUG : urllib3.connectionpool: https://hg.mozilla.org:443 “GET /integration/autoland/json-pushes?changeset=602084a80545c3aa2879ec54585f298966b00839&full=1 HTTP/1.1” 302 0 2026-04-14T18:40:45.446000: DEBUG : urllib3.connectionpool: https://hg-edge.mozilla.org:443 “GET /integration/autoland/json-pushes?changeset=602084a80545c3aa2879ec54585f298966b00839&full=1 HTTP/1.1” 200 None 2026-04-14T18:40:45.482000: DEBUG : Found commit message: Revert “Bug 2029066 - Remove Sinking of Live instructions. r=iain” for causing spidermonkey build bustages at Sink.cpp

  This reverts commit dcb553336bdbc8a96073e287127b82eb5144d8aa.

  2026-04-14T18:40:45.488000: DEBUG : Did not find a branch, checking all integration branches 2026-04-14T18:40:45.492000: INFO : The bisection is done. 2026-04-14T18:40:45.496000: INFO : Stopped

  there is a similar “Bug 2033231 - Middle clicking alternate engines no longer perform a search on the current search bar text in a new tab” but the dates don’t match and the issue isn’t fixed in current Nightly.

  I assume this regression isn’t an intended change but I can’t tell without seeing the regressor bug. I used the functionality as a workaround for what has caused internal Mozilla debate: 724239, 776167, 1415136 and there is still inconsistent behaviour between about:newtab, about:blank and about:privatebrowsing”

  • This bug: https://bugzilla.mozilla.org/show_bug.cgi?id=2037361, which is assigned (as of this writing, an hour ago!)
• Query for finding regressionwindow-wanted bugs
  • ./mach mozregression to find the regressor
• Let’s solve a mystery!
  • Where are those spans going? Where is the progress going?!
    • Our self-closing tags were confusing things. Got rid of them!
  • Build fluent migration for the strings we moved
    • Still to do
  • Fix button styling to match existing button behaviour
    • Done
• TODO:
  • Talk to emilio about center cropping support in CSS for privileged markup / layout
  • Factor out download item UI into a reusable Lit element
• Rate this episode

Chat

• Join us on Matrix!

Other

• Felicia Bacon
• npb hacks on the SpiderMonkey JS engine
• Compiler Compiler live stream
• Try out Mozilla VPN
• How mconley uses Mercurial
• Fission - Read more about it
• mozconfigwrapper - A Wrapper to keep different mozconfigs
• MyQOnly Mikes Addon for showing how many reviews are in your review queue - Source at Github
• Mike’s Firefox Color Theme
• Check if a service you are using, has been part of a breach via Firefox Monitor
• Codetribute - Help contribute to Firefox, good mentored bugs for You.
  • First, Create a Mozilla Bugzilla account.