PUBLIC MARKS from decembre with tags firefox & dev

element() brings CSS design to a new level, in an easily way. Few ideas that comes to my mind (some that I've already used since the last 4 years): - when you have to deal with duplicated content in advanced effects - live thumbnails of previous/next slides in a slideshow - live zoom over an image, for example in an e-commerce product page - animated background, using CSS Animations or by referencing a video, canvas or SVG - faking backdrop-filter or filter() - watermark with multiples backgrounds from Lea Verou idea - and anything you’re currently thinking of ;) Few things we can note: - prefixed for now in Firefox: -moz-element() - impact on rendering performance when using multiple reference. Not as bad as CSS filters, but still something you have to consider - there’s a CanIUse support page - Issue Chromium - Issue WebKit - No mention from IE Platform Status

An alternative or Update ? Rated 5 out of 5 stars by decembre on Feb. 21, 2018 · permalink When i write an Userstyle it is (was) the primary tool i use with Firebug. Now i search an alternative for this great tool: The devtool don't give us the possibility to search or test a specific CSS selector like Firepath do. And in an other hand the DevTool is less useful than Firebug (it don't give an easy way to identify in which userstyle a CSS rule is - with an human reading way)

Custom Scrollbars for Firefox 57+ : Method 1 - files for Firefox profile folder only M1 is based on this project by nuchi: https://github.com/nuchi/firefox-quantum-userchromejs M1 will stop working when Mozilla drops XBL support. From this projects method 1 : folder copy userChrome folder and userChrome.css file to PROFILENAME chrome or add code from userChrome.css file to an existing userChrome.css file. Method 2 - files for Firefox folder and to Firefox profile folder M2 is based on this project by ardiman: https://github.com/ardiman/userChrome.js From this projects method 2profile folder copy userChrome folder and userChrome.js file to PROFILENAME chrome . From this projects method 2firefox folder copy defaults folder and config.js file to Firefox main directory (where the Firefox executable is). Script/startup cache must be deleted after every change! Where to fine startupCache folder? about:profiles > Local Directory > Open Folder, close Firefox and delete all files in startupCache folder. Location on WINDOWS: C:Users NAME AppDataLocalMozillaFirefoxProfiles PROFILE startupCache Location on LINUX location: home NAME .cachemozillafirefox PROFILE startupCache This is not the same profile folder custom scripts and styles are stored! More info about startup cache removal (in German): https://github.com/ardiman/userChrome.js/wiki/Skriptcache More info about startup cache removal (in English )

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

How to enable Firefox WebExtensions on Mozilla websites (in https://www.ghacks.net/2017/10/27/how-to-enable-firefox-webextensions-on-mozilla-websites/): - Load about:config in the Firefox web browser. - You can run a search for just to make sure it does not exist: privacy.resistFingerprinting.block_mozAddonManager. It does not in the most recent Firefox Nightly builds at the time of writing. - Right-click in the part of the window that lists the preferences, and select New > Boolean from the context menu. - Name the new Boolean value: privacy.resistFingerprinting.block_mozAddonManager. - Set its value to true.

Recherche: À partir de Firefox 45, la boite de recherche de l'Inspecteur trouve les correspondances dans tout le markup du document ouvert, ainsi que dans toutes les frames. Pour commencer une recherche, il suffit de cliquer sur la boîte de recherche pour l'agrandir ou bien d'utiliser les raccourcis clavier Ctrl + F , ou Cmd + F sous Mac. Lors de la saisie, une pop-up d'autocomplétion affiche toutes les classes ou ID qui correspondent à la recherche en cours :

You may be able to reenable Firebug by setting the preferences: - Go to the about:config (type in url bar) - Find xpinstall.signatures.required (set to false) - Find browser.tabs.remote.autostart (set all to false: browser.tabs.remote.autostart.1 and browser.tabs.remote.autostart.2) I'm using Firefox for development, and both Firebug and Firefox development tools, for different purposes (Firebug for DOM and CSS manipulation, which is superior, and Firefox Tools for Console and NET panel, which are cleaner).

To help illustrate how to develop extensions, we maintain a repository of simple example extensions at https://github.com/mdn/webextensions-examples. This article describes the WebExtension APIs used in that repository.

General Questions/ Is LibX Free? How is LibX different from other library toolbars? Is there a version for my library? What version of Firefox does it work with? Does it work with Internet Explorer (IE)? Can I have two editions installed simultaneously? How can I get the Google Scholar search to work even if my institution has not registered with Google? How do I uninstall LibX?

you can use Firefox menu->Developer->BrowserToolbox to examine UI elements and play with CSS. After you open it, click OK in the main browser window, wait a few seconds for the toolbox to initiliaze, then use the first button in its toolbar to pick an element (bookmarks button in your case).

WebPJS - Google's new image format WebP for not supported browsers (with alpha-channel)

Use the Inspector to examine and modify the structure and layout of a page. There are two main ways to open the Inspector: - without an element selected: choose the "Inspector" option from the "Web Developer" menu or the equivalent keyboard shortcut - with an element selected: right-click an element on a web page and select "Inspect Element"

A group of developers working towards a client-side solution for delivering alternate image data based on device capabilities to prevent wasted bandwidth and optimize display for both screen and print.

You can inspect the Firefox user interface directly with DOM Inspector. (Which is not the same Inspector as in the Web Developer menu.) [addons.mozilla.org] https://addons.mozilla.org/en-US/firefox/addon/dom-inspector-6622/Click the icon in the upper-left corner of DOMi, the one with a pointer on it, then click anywhere in the browser to select an element; that element will be highlighted in the left column. Right-click the highlighted entry to display a context menu: "Copy Selector" suggests selectors for the element, "Set Pseudo-classes..." lets you switch on :hover. Notice that the browser itself is a document with its own URI, chrome://browser/content/browser.xul, Most of the browser chrome is XUL, but some, such as the Stylish editor, is HTML embedded in XUL. https://developer.mozilla.org/en-US/docs/XUL

Popcorn.js is an HTML5 media framework written in JavaScript for filmmakers, web developers, and anyone who wants to create time-based interactive media on the web. Popcorn.js is part of Mozilla's Popcorn project.

Firebug est une extension firefox incontournable pour tous les intégrateurs et développeurs web. Elle permet entre autre de voir comment le navigateur interprète les différents languages et permet aussi d’interagir en temps réel avec le code source. Plutôt que des longues explication une petite vidéo vous aidera à mieux comprendre comment firebug peux changer votre façon de débugger vos pages web

Well, here is how to run userscripts in chrome : * Add this flag to Google Chrome launcher : --enable-user-scripts - Now, create a folder in your user data directory. Name it as User Scripts. - Save your all GM scripts in this folder. - If you want to import all userscripts from Firefox — you need to do it manually. We have shown you the way to backup your Greasemonkey scripts. Just navigate to your GM script folder in Firefox data directory as describe in this post. Now, you can copy and paste every script’s file manuallyAnd, you are done! Restart the chrome — and visit any related site. It is quite possible that your favorite GM Script will do the magic. - Important fact : Chrome supports “Early Injection” – the ability to run scripts very early in the page’s lifecycle. In Firefox, userscripts run after page load. But in chrome, you can set it to run before page load. For this, you need to add an extra line in scripts meta data section : // @run-at document-start

Chrome has a secret weapon. His name is Aaron Boodman, and he created Greasemonkey. He now works on the Chrome Extensions team at Google. Even though Greasemonkey on Chrome isn't yet as mature as the Firefox version -- 15-25% of scripts might not work on Chrome yet -- it will definitely get there with Boodman's help. If you need some scripts to get you started, you can scope out Download Squad's 10 Greasemonkey Scripts You Shouldn't Browse Without, or peruse the large selection at userscripts.org.

Nouvelle interface de programmation afin de faciliter davantage le développement de nouvelles extensions. Baptisé Jetpack, permet à n'importe qui capable de coder une page web de moduler le navigateur. Oubliez les redémarrages du logiciel, il suffira de cliquer sur un simple lien pour installer l'addon de son choix et de recharger la page en cours de consultation. « Nous voulons permettre à plus de gens de participer à la création des fonctionnalités du navigateur », explique Aza Raskin, en charge du département de l'expérience utilisateur chez Mozilla. Il précise que n'importe quel développeur web familier avec le HTML, le CSS ou le JavaScript peut se lancer dans l'aventure.

Turns your browser into a mashup platform, by allowing you to extract data from different web sites and mix them together. Also allows you to store this extracted information locally for you to search later and to exchange at need the collected information with others.

C'est réservé aux bidouilleurs mais en gros le principe c'est d'utiliser javascript sur les sites que vous visitez afin de réaliser des choses sympathique comme automatiser certaines parties d'un site ou changer le comportement d'un script...etc C'est un peu comme GreaseMonkey mais en plus simple (pour peu que vous connaissiez Javascript) Mais là ou ça devient interressante, c'est que coupler à Firebug, qui est une extension Firefox pour débugger le javascript des sites web (avec point d'arrêt and co), il devient relativement simple de faire faire au site ce que vous voulez.

Traduction française de l'extension Web Developer de Chris Pederick (http://chrispederick.com/work/web-developer/). Cette magnifique extension propose plein d'outils facilitant le développement de site web.

A Complete List Of Firefox Extensions For Web Developers January 7th, 2009 in Tools