OPFS Explorer is a Chrome DevTools extension that allows you to explore the Origin Private File System (OPFS) of a web application.

Latest Version

Version
1.8.0
Update
November 19, 2024
Size
15.57KiB
Developer
tomayac.com
Category
Users
5,000+
Rating
4.21429 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
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OPFS Explorer Extension

OPFS Explorer is a Chrome DevTools extension that allows you to explore the Origin Private File System (OPFS, https://fs.spec.whatwg.org/) of a web application.

To use it, open Chrome DevTools and click on the OPFS Explorer tab. The extension will automatically analyze the OPFS of the current web application and display the file hierarchy. You can then click on any file to download its contents or delete the file (which may fail if the file is locked). Note that deleting files may cause the application to break.

You can test the extension on the demo page (https://tomayac.github.io/opfs-explorer/).

The source code is on GitHub (https://github.com/tomayac/opfs-explorer).
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "OPFS Explorer", "description": "OPFS Explorer is a Chrome DevTools extension that allows you to explore the Origin Private File System (OPFS) of a web application.", "manifest_version": 3, "version": "1.8.0", "devtools_page": "devtools.html", "content_scripts": [ { "matches": [ "https://*/*", "http://localhost/*", "http://0.0.0.0/*", "http://127.0.0.1/*" ], "run_at": "document_idle", "js": ["contentscript.js"] } ], "background": { "service_worker": "serviceworker.js" }, "icons": { "48": "icon48.png", "128": "icon128.png" }}
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How to download and manually install OPFS Explorer extension for Chrome

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

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

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

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

This is another method to install OPFS Explorer 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 OPFS Explorer extension file

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

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User reviews

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Markus Krainz (ID: 000000c86de1255a) Voted 2 ★ - Updated 09/20/2023 1. Very basic explorer that works with the tomayac test page. Seems to only support very simple listing, deleting and "downloading" of files. But not creating new files or copying files into OPFS. 2. Hangs forever on "⌛Analyzing Origin Private File System" if the page you're opening it on doesn't make use of OPFS. It would be better to show an empty filesystem instead of hanging forever. 3. Also it doesn't seem to show the OPFS files of a browser extension that is storing data in OPFS. It just hangs on "⌛Analyzing Origin Private File System" again. Apparently it's not useful for debugging browser extensions.

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Stephan Beal (ID: 000000a408514320) Voted 5 ★ - Updated 08/29/2023 Simple, straightforward, and it has specific support for showing certain metadata about sqlite3 "OPFS SAH-Pool" databases (that's actually really useful for me).

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Jephthah Yankey (ID: 00000078d5eb3c67) Voted 5 ★ - Updated 04/08/2023 Works pretty well.

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Jaroslav “Dero” Polakovič (ID: 0000001c9c29aebf) Voted 5 ★ - Updated 02/11/2023 Seems like it no longer works in 110.0.5481.78. EDIT: Started working after a while on its own.

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Johannes Schickling (ID: 00000043199fdf2f) Voted 5 ★ - Updated 11/23/2022 Works very nicely. Note it requires `https` though.