Firefox Developer Tools ideas

Welcome to the feedback channel for Firefox Developer Tools. This is a place for constructive feedback around the tools with ideas and feature suggestions. It is not a support forum or place to report bugs. For support, please go to the #devtools channel on Mozilla IRC or the firefox-developer-tools tag on Stack Overflow, and for reporting bugs, go to Bugzilla.

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  1. Save CSS changes from Inspector panel

    Being able to save changes to the stylesheet from the inspector panel instead of the style editor would be an absolute game changer. Emmet LiveStyle that works with Chrome does that, but I haven't found anything that works with Firefox. My workflow is typically use inspector to find object I'm styling, find the line number then edit in Sublime. If I'm experimenting I'll try it out in inspector, then make those changes in Sublime. I'd love if those style changes were just made in browser.

    6 votes
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      1 comment  ·  Flag idea as inappropriate…  ·  Admin →
    • Inspect print version

      Add an abitity to inspect not only the screen version, but also a print version of the site. It's useful for inspecting @media print styles

      10 votes
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        0 comments  ·  Flag idea as inappropriate…  ·  Admin →
      • Ability to resize columns in network pane

        Currently the columns in the network pane are fixed width. Sometimes I want quickly look at a number of requests which all go to the same domain and have long urls (the part I want to see is at the end).

        63 votes
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          2 comments  ·  Flag idea as inappropriate…  ·  Admin →
        • Connexion throttling

          It's been a while since I was looking for such a feature, and Chrome added it this summer.
          As a web developer, I would love a native tool to reduce bandwidth in order to simulate a slow mobile (or ADSL) connexion to improve the user experience in those cases.

          67 votes
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            1 comment  ·  Flag idea as inappropriate…  ·  Admin →
          • Give me a way to *fully* emulate the mobile browser in FF desktop

            Not just emulating dimensions for responsive. Browser should override media queries, lie about other feature detects, etc, so my mobile app ACTUALLY WORKS like it's on mobile.

            179 votes
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              4 comments  ·  Flag idea as inappropriate…  ·  Admin →
            • A JS editor

              Suppose we could edit JS just as we can edit CSS with the CSS editor. So we can change things on the fly and get instant feedback without having to reload the page. Right now the most I can do with regards to JS code is... debug it, which is a bit limiting.

              It'd be awesome if I could edit the code of a function and have it automatically reevaluated and stuff. Not sure if this is even possible at all but hey this is an idea.

              349 votes
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                12 comments  ·  Flag idea as inappropriate…  ·  Admin →
              • Line level JavaScript profiling

                It would be very useful to be able to see exactly which lines in your program are hot rather than just which function is hot.

                For example, if you run http://phoboslab.org/files/jsmpeg/ through the profiler it will tell you that decodePicture is hot. Unfortunately function level granularity is not enough to identify where any performance bottlenecks lie as decodePicture is a complicated 80 line function.

                7 votes
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                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                • Add further support for clip-path

                  It would be great to build in more support for clip-path beyond the url() property.

                  2 votes
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                    0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                  • Better output for objects and arrays

                    The way it is nowadays, we can only see one object at time!
                    It would be much better if we could, for example, expand or compact multiple objects ... this way, we could even compare objects or arrays.

                    79 votes
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                      3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                    • show a diff of style changes manually entered in the styles pane

                      When you make style changes, it would be awesome to have an option to show all your changes across the page together, for ease of extracting experimental changes.

                      E.g. I've made changes to a bunch of stuff, trying out a new style, and now I have to remember the changes I made, or at least the dom nodes so I can navigate to them and copy them out.

                      78 votes
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                        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                      • I want to be able to perform a simple find-in-page operation (not find with CSS selectors)

                        Apple-F or Ctrl-F should perform a simple text search in the document inspector HTML - instead it now performs a CSS selector search (which is a great feature, but I want/need a simple text search in page function)

                        3 votes
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                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                        • Button for minimising the toolbox to just the buttons

                          I like the way the IE devtools shrink to just the top line so that more of the page can be seen, but things are still only a click away.

                          In Firefox's case, the toolbox buttons would still work, and clicking on a tab label should open the toolbox to that tab.

                          1 vote
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                            2 comments  ·  Flag idea as inappropriate…  ·  Admin →
                          • showing data in network response tab

                            When inspecting items in the Response Tab, it would be usefull to have some options.

                            Sometimes its JSON and its all collapsed. Maybe and expand all, or view as structured string.

                            Sometime its a long string, and you have to scroll because it doesn't soft break.

                            sometimes api's return JSON but don't set the header so its not formatted at json. Maybe autodetect.

                            Thanks

                            37 votes
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                              5 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • Recalculate JS line numbers after pretty print

                              Whenever there is any kind of console notification (log, warn, error, etc) it prints the line number, and clicking that takes you to that line in the debugger. However, if your code is minified that number is invariably 1 or 2. There is already the option to pretty print minified code, but it would be nice if after prettifying, you could then jump to the actual line number that triggered the console alert.

                              Chrome currently supports this.

                              Thanks for all the awesome work everyone!

                              128 votes
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                                3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                              • Complete Selector Path like in Firebug

                                It would be very helpful to let users copy the complete CSS path for an element...not only the explicit selector! Maybe you can add a second option for that in the context menu!???

                                1 vote
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                                  0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                • change syntax highlighting colors

                                  We need the ability to change syntax highlighting colors in the dev tools, a simple theme system. I'm doing most of my CSS in Firefox now and while the default colors are okay, they're not what I'm used to, and it's confusing when jumping back and forth between my code editor (TextMate) and FireFox. It really sucks that classes and attributes are the same color.

                                  This should be implemented so that we can save our settings and share them as XML files or another file format that is a lightweight, standard format that anyone can open and edit easily.

                                  If…

                                  9 votes
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                                    3 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Alternative color pickers

                                    1 with separate sliders for Hue, Saturation, Lightness, Alpha to match CSS

                                    and 1 with sliders for Hue, Saturation, Brightness,, Alpha to match Photoshop

                                    and 1 that's more like a color wheel or the color picker in Painter.

                                    1 vote
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                                      0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                    • An HTML editor

                                      As the scratchpad, but for a complete HTML page : it would be nice in order to test some basic ideas (html / js / css together in the browser).

                                      24 votes
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                                        1 comment  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Live html editor like in firebug

                                        Hello there!
                                        The only think that keep me from switching to firefox devtools completely is the luck of live html editing.

                                        In firebug when you inspect the Dom tree there's an edit button on the left top corner that lets you edit the html I'm real time. This is very very helpful when you build or edit html frameworks.

                                        Right now you can right click and edit the html but to see the changes you have to click outside of the box.

                                        Hope you understand! Keep up the good work :)

                                        59 votes
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                                          0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Give "width" priority over "widows" in css autocomplete.

                                          Seriously, how often does anyone intentionally type "widows".

                                          Typing "wi" should show "width" as the first autocomplete option.

                                          3 votes
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                                            2 comments  ·  Flag idea as inappropriate…  ·  Admin →
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