![]() See the accompanying video for examples.) Beginning of the waterfall diagram for a page load of msn.com.Įach file is listed, along with a multi-colored bar representing various aspects of the amount of time it took to load that file.ĭepending on the website design, there can be hundreds of files involved in displaying a single webpage.Ĭlick on a file to get a breakdown of the time spent fetching that single file. (You may need to resize the pane and/or the column containing the displayed waterfall. The result will display as a cascading “waterfall” of information in the networking pane. Additional font files used by the page.Every JavaScript file used by the page.The networking pane will be updated to reflect all the resources being requested by your web browser. Getting performance information about slow-loading pagesĬlick the refresh button on the webpage you’re viewing. To provide as much screen real estate as possible, maximize Firefox. You can also adjust the relative size of the pane by clicking and holding on the border separating it from the main window and dragging to a size you find useful. You can adjust the location of the pane to be below, to the right, to the left, or in a separate window entirely by clicking on the ellipsis in the upper-right corner of the pane. This will open an additional pane of information alongside or below your main webpage display. Network item on Web Developer menu.Ĭlick on Network. Web Developer on the Firefox menu.Ĭlick on Web Developer. Developer ToolsĬlick on the “ hamburger icon” in the upper-right corner of the Firefox window to display the menu. ![]() Each file goes through several steps as part of the process, and looking for trends within a page, and across multiple page loads can point to problem areas. You can use web developer tools in Firefox and other browsers with network performance monitoring options that will display a file-by-file performance graph of a slow-loading page. ![]()
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