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  • Pixel Perfect 2: extension for Firefox Developer Tools

    Pixel Perfect is a Firefox extension that enables web designers to overlay a web page with semi-transparent images (layers). The designer can then tweak the page’s content until it exactly matches the layer. This extension was originally introduced for Firebug back in 2008 but has not been maintained for several ...

  • What do you want from your DevTools?

    Every tool starts with an idea: “if I had this, then I could do that faster, better, or more easily.” The Firefox Developer Tools are built atop hundreds of those ideas, and many of them come from people in the web development community just like you. We collect those ideas ...

  • WebRTC in Firefox 38: Multistream and renegotiation

    Building on the JSEP (Javascript Session Establishment Protocol) engine rewrite introduced in 37, Firefox 38 now has support for multistream (multiple tracks of the same type in a single PeerConnection), and renegotiation (multiple offer/answer exchanges in a single PeerConnection). As usual with such things, there are caveats and limitations, but ...

  • Understanding the CSS box model for inline elements

    In a web page, every element is rendered as a rectangular box. The box model describes how the element’s content, padding, border, and margin determine the space occupied by the element and its relation to other elements in the page. Depending on the element’s display property, its box may be ...

  • How to make a browser app for Firefox OS

    Firefox OS is an operating system built on top of the Firefox web browser engine, which is called Gecko. A browser app on Firefox OS provides a user interface written with HTML5 technology and manages web page browsing using the Browser API. It also manages tabbing, browsing history, bookmarks, and ...

کمک به بهینه سازی MDN

همه‌ی بخش‌های MDN(اسناد، نسخه‌های نمایشی، و خود سایت) توسّط یک جامعه‌ی باز از توسعه دهندگان ایجاد شده‌اند. لطفاً به ما بپیوندید! یکی از این راه‌ها را برای کمک برگزینید: