An advanced postMessage devtools panel

Latest Version

Version
0.1.3
Update
December 17, 2024
Size
103KiB
Developer
Category
Users
0
Rating
0 ★
Manifest Version
3
Web Store Status
Languages Support
English
한국어
See more
Permissions
Scripting
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Postmaster Extension

Postmaster is a devtools panel for logging postMessages, which can be useful for debugging cross-window communication, including messages sent from iframes and MessagePorts. It includes a feature rich toolbar, making it a powerful debugging tool:

FEATURES:

LOGGING: Postmaster logs all messages with their origin, destination, time received, timestamp offset, and payload. Clear your logs at any time.

SEARCH: Filter through any of your received messages by origin, destination, or even the data payload. Supports regex matching to empower complex use cases.

SORT: Toggle how inbound messages are displayed, based on their time of receival.

PRETTIFY: By default, Postmaster displays all message payloads as formatted JSON when applicable. For a more compact view, you can turn this off.

PAUSE/PLAY: For debugging in scenarios with high volumes of exchanged messages, Postmaster supports a pause/play functionality to temporarily control the influx of logged messages.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "default_locale": "en", "name": "Postmaster", "version": "0.1.3", "description": "An advanced postMessage devtools panel for Chrome", "host_permissions": [ "" ], "permissions": [ "scripting" ], "background": { "service_worker": "background.iife.js", "type": "module" }, "action": { "default_icon": "icon-34.png" }, "icons": { "128": "icon-128.png" }, "content_scripts": [ { "matches": [ "http://*/*", "https://*/*", "" ], "js": [ "content/index.iife.js" ] } ], "devtools_page": "devtools/index.html", "web_accessible_resources": [ { "resources": [ "*.js", "*.css", "*.svg", "icon-128.png", "icon-34.png" ], "matches": [ "*://*/*" ] } ]}
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How to download and manually install Postmaster extension for Chrome

Looking for a way to install Postmaster 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 Postmaster extensions manually, this article outlines two simple methods to effortlessly install Postmaster extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Postmaster extension and manually install through Drag &Drop

If you ever need to manually install a Postmaster 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 Postmaster Extension by clicking the "Download CRX" button on the website.

Look for the Postmaster extension you wish to install. Go to the website and download the Postmaster extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Postmaster 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 Postmaster 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 Postmaster extension for Chrome and install in Developer Mode

This is another method to install Postmaster 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 Postmaster extension file

Select and download the Postmaster 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 Postmaster 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 Postmaster 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 Postmaster 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 Postmaster extension in 2 ways. We hope this guide proves helpful.

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