Firefox DevTools

@FirefoxDevTools

The official Firefox DevTools account. Follow us here to see the very latest experiments, milestones and help us build the best Firefox.

mozilla.org/firefox/develo…
Beigetreten Juli 2013
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  1. Angehefteter Tweet
    16. Mai

    Faster and reliable JS Debugging in Firefox 67, informed by your feedback 📣. 🏎 FASTER: opening, source mapping, stepping, preview 📦 ROCK-SOLID: TypeScript, Babel, Webpack, React, Vue.js … 🚲 EASIER: Logpoints, Inline BPs … Have you tried it out?

    7 Antworten 115 Retweets 301 Gefällt mir
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  2. vor 13 Stunden

    🌁 Bay Area folks: Our own and will be speaking at on Aug 23! We'll be joined by our fellow DevTools makers from Apple (), Google (), and Microsoft ().

    5 Retweets 15 Gefällt mir
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  3. hat retweetet
    6. Aug.

    If you're using , did you see this new icon in the input? If you tried it, how does it feel? We'd love to hear your feedback!

    New "Open Editor" icon in the console input of Firefox DevTools
    7 Antworten 21 Retweets 39 Gefällt mir
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  4. hat retweetet
    3. Aug.

    When you're using , Grid Inspector is a must have!

    2 Antworten 10 Retweets 35 Gefällt mir
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  5. hat retweetet
    31. Juli

    Did you know there’s a panel in Firefox Developer Tools that keeps track of any changes you make to your CSS, and lists everything so you can copy & paste it elsewhere?

    87 Antworten 656 Retweets 2.238 Gefällt mir
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  6. 30. Juli

    Your feedback is informing the future interface work for , making performance analysis easier to record, share and analyze for everybody in the team.

    1 Retweet 11 Gefällt mir
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  7. 30. Juli

    🧠 Brain-Picking Time ⛏ When you analyze a recording in your DevTools Performance panel: 1. What are the first aspects that you look for to navigate the recording? 👀 2. Which parts of the UI do you spend most of your time in? 🔎 Thank you! /hk

    9 Antworten 14 Retweets 33 Gefällt mir
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  8. hat retweetet
    30. Juli

    Web devs: What kind of problems do you typically use a profiler (e.g. Firefox or Chrome's performance panel) to solve? Is it slow JS, network requests, worker synchronizing, graphics code...?

    7 Antworten 8 Retweets 11 Gefällt mir
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  9. 26. Juli

    Thanks all for the awesome response to our whitespace nodes! We're going to improve the UI so it's more obvious what it is. —

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  10. hat retweetet
    24. Juli

    Did you know that shows whitespace nodes when those nodes do matter in the layout? No more hunting for mysterious spacing between elements!

    Screenshot of Firefox DevTools showing whitespace text nodes in the inspector DOM tree and highlighting them in the page
    10 Antworten 180 Retweets 636 Gefällt mir
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  11. 24. Juli

    💡 Help us make better accessibility tools! Have you used a website lately that had inaccessible elements, e.g. non-semantic buttons, checkboxes, and headings? Tell us about it via this short form: —V

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  12. 24. Juli

    Did you know that shows whitespace nodes when those nodes do matter in the layout? No more hunting for mysterious spacing between elements!

    Screenshot of Firefox DevTools showing whitespace text nodes in the inspector DOM tree and highlighting them in the page
    10 Antworten 180 Retweets 636 Gefällt mir
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  13. hat retweetet
    23. Juli

    Custom elements on the web are often inaccessible. Mozilla can help fix that by alerting authors of best practices in the Firefox developer tools. You can help us by pointing out sites with inaccessible custom elements via this survey. Thanks!

    2 Antworten 50 Retweets 53 Gefällt mir
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  14. 19. Juli

    📯 Feedback Wanted 📯 Are there any ⌨️ shortcuts (that work in other tools) that you accidentally trigger in Firefox DevTools, which then either don't work 🤔 or trigger the wrong thing 😤? Thank you -

    15 Antworten 16 Retweets 35 Gefällt mir
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  15. hat retweetet
    16. Juli

    I just came across the font panel in their dev tools. Good stuff. 👌 Especially the "all fonts on page" can be very handy. alt: Firefox font panel in action – changing font settings like size and letter spacing but also analyzing fonts included on the page.

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  16. 17. Juli

    There are a few blog posts to read different perspectives on this survey and the impact your help as:

    3 Retweets 13 Gefällt mir
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  17. 17. Juli

    Make yourself heard and help us move the web forward with: ✨ 's First Annual Web Developer & Designer Survey (~20min) ✍️ Open by default, the results will be published to inform platform features, tooling and and standards works!

    9 Antworten 49 Retweets 67 Gefällt mir
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  18. 16. Juli

    Tutorial: Debugging CSS Grid with Firefox Dev Tools (by ) —V

    23 Retweets 56 Gefällt mir
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  19. hat retweetet
    9. Juli

    Today we released Firefox 68 with a color contrast audit feature in the dev tools. Before, you could inspect individual elements for color contrast. Firefox now offers a full page color contrast audit that identifies all elements on a page that fail color contrast checks.

    7 Antworten 287 Retweets 783 Gefällt mir
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  20. 27. Juni

    Thanks everyone for all the great input on the Inspector 3rd Pane! Followup question: If you use Box Model and Computed together, what are the steps of that workflow? —

    We'd like to learn more about how you use the Inspector's 3rd pane. Which features do you use most often? Do you use some tools together (back-and-forth, or one after another)? — 🐡 Flexbox 🍱 Grid 📦 Box Model 🤖 Computed 🚢 Changes 🔤 Fonts 🎞 Animation
    4 Antworten 3 Retweets 15 Gefällt mir
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  21. 27. Juni

    ⤵️

    So I was watching stream yesterday and at some point he hit an issue that often bites me as well in the console: if you evaluate an expression with a `let` variable (e.g. `let x = 1`), then doing it again will throw (redeclaration of let x), which is legit
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