Test and debug cumulative layout shifts (CLS) in the browser

Latest Version

Version
0.0.0.3
Update
April 22, 2021
Size
107KiB
Developer
Category
Users
6,000+
Rating
5 ★
Manifest Version
2
Web Store Status
Languages Support
English (UK)
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Permissions
ActiveTab
BrowsingData
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CLS Checker - Journey Further Extension

This tool measures the 'cumulative layout shifts' that occur when a page is loaded in the browser using data from the Chrome Performance API. These are then listed showing the 'layout shift' score and visualised on the webpage.

Green squares show where the element started and red indicates where the element was shifted to.
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Source Manifest.json

{
"update_url": "https://clients2.google.com/service/update2/crx",
"description":"Test and debug cumulative layout shifts (CLS) in the browser",
"version":"0.0.0.3",
"name":"CLS Checker - Journey Further",
"background":{"scripts":["background.bundle.js"]},
"browser_action":{"default_popup":"popup.html",
"default_icon":"cls-favicon-32.png"},
"icons":{"128":"cls-favicon-128.png"},
"permissions":["activeTab",
"browsingData"],
"manifest_version":2,
"content_security_policy":"script-src 'self' 'unsafe-eval'; object-src 'self'"}
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How to download and manually install CLS Checker - Journey Further extension for Chrome

Looking for a way to install CLS Checker - Journey Further extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install CLS Checker - Journey Further extensions manually, this article outlines two simple methods to effortlessly install CLS Checker - Journey Further extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download CLS Checker - Journey Further extension and manually install through Drag &Drop

If you ever need to manually install a CLS Checker - Journey Further extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the CLS Checker - Journey Further Extension by clicking the "Download CRX" button on the website.

Look for the CLS Checker - Journey Further extension you wish to install. Go to the website and download the CLS Checker - Journey Further extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for CLS Checker - Journey Further extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the CLS Checker - Journey Further extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download CLS Checker - Journey Further extension for Chrome and install in Developer Mode

This is another method to install CLS Checker - Journey Further extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the CLS Checker - Journey Further extension file

Select and download the CLS Checker - Journey Further extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the CLS Checker - Journey Further extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your CLS Checker - Journey Further extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the CLS Checker - Journey Further extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install CLS Checker - Journey Further extension in 2 ways. We hope this guide proves helpful.

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User reviews

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서교욱 (ID: 00000062dcc6823f) Voted 5 ★ - Updated 12/21/2022 This a very useful program that saves time. If there's a mobile version, it'll be perfect

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Rife Interactive (ID: 0000001ef69260fe) Voted 5 ★ - Updated 04/01/2022 FANTASTIC tool - great job guys, thank you so much

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Eric Caldwell (ID: 0000008466440698) Voted 5 ★ - Updated 08/14/2021 Been waiting on an extension that does exactly this! Bravo. Please keep this extension updated.

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Dan Rowlands (ID: 000000251ea51e56) Voted 5 ★ - Updated 05/05/2021 Great tool for identifying CLS issues on page - ideal for visualising issues that developers can then use to fix CLS issues to improve performance!

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Dan Nutter (ID: 0000009c1d8fa545) Voted 5 ★ - Updated 05/05/2021 This tool has made isolating CLS issues so much easier!! It’s now a vital part of my Core Web Vitals analysis toolkit.