Removes metadata and hidden data in email attachments preventing the leakage of confidential information.

Latest Version

Version
3.0.3
Update
October 17, 2024
Size
235KiB
Developer
www.adarsus.com
Category
Users
1,000+
Rating
5 ★
Manifest Version
3
Web Store Status
Languages Support
English
Español
See more
Permissions
Storage
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MetaClean for Gmail Extension

MetaClean for Gmail automatically removes, adds, or modifies metadata in email attachments, preventing the leak of confidential information that occurs continuously in this type of communication and avoiding possible economic and reputational damages derived from the malicious use of metadata.

Why I should use MetaClean for Gmail?
• Data Breach Prevention: Every document contains metadata. For example, metadata is embedded in the file and is different to the information that is typed on the page – such as Author, track changes or comments. It can tell the reader who created the document, how long was spent editing it, and where the document is saved. Cleaning a document of metadata means that the recipient will only be sent what would be printed. Removing potentially harmful forms of metadata from the attached files is a risk area that should be considered when investigating ways to prevent email-related data leaks.
• Phishing Attack Prevention: MetaClean prevents the exfiltration of information through metadata which is commonly used to generate phishing attacks.
• Ease of use and there is no user registration required: MetaClean for Gmail is Fully integrated with Gmail, just install and enjoy it!

How to use MetaClean for Gmail?
• This extension automatically processes the document's metadata when it is attached, you don't need to take any additional action, ensuring that the attachments you send are free of metadata and personal information.
• It allows you to quickly and intuitively select the types of files to process (see screenshot).
• It shows information of interest to the user, for example, when a PDF file is digitally signed.

➤ Standard Functionalities:
• FREE FOR PERSONAL USE.
• Detection of signed PDF files: To avoid invalidation of the signature, a warning will be displayed indicating whether you want to process the metadata of the signed PDF file (see screenshot).
• Displays a warning when attaching Microsoft Office files with Track Changes and/or Comments enabled.
• Removes metadata from all versions of Microsoft Office, Open/Libre Office, PDF, RTF and Image, Audio and Video files.
• Supports ZIP and 7z files: compressed documents will be processed by MetaClean.
• Delete hidden data such as: Printer routes, history of document changes, etc.
• For free version, the tag \"Metadata removed by MetaClean (www.adarsus.com)\" will be added to the keyword metadata in processed documents.

➤ Enterprise Functionalities:
• Creation of metadata templates to remove, add or modify standard and customized metadata tags.
• The text: \"Metadata removed by MetaClean (www.adarsus.com)\" will be removed from the metadata tag: keyword.

For business use contact us at: [email protected]

How to view PDF document metadata?
Open the concerned PDF document in Adobe Acrobat and go to File > Properties > Description and Custom tabs. It will show you a window that consists of different components of the metadata of the concerned PDF document.

How to view Microsoft Word/Excel/PowerPoint document metadata?
Open the Word/Excel/PowerPoint document and go to \"File\" menu. Click \"Info\" and then click \"Show all Properties\" to view the metadata entries for the document.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "MetaClean for Gmail", "description": "__MSG_extensionDescription__", "default_locale": "en", "version": "3.0.3", "author": "Adarsus Technologies S.L.", "content_scripts": [{"matches": ["https://mail.google.com/*"],"css": ["/css/content.css"],"js": ["/js/app/content.js"],"run_at": "document_start" }], "background": {"service_worker": "/js/app/background.js" }, "action": {"default_popup": "/popup.htm", "default_title": "MetaClean for Gmail", "default_icon": { "19": "/images/MetaClean19.png","22": "/images/MetaClean22.png","38": "/images/MetaClean38.png", "48": "/images/MetaClean48.png" } }, "permissions": ["storage" ], "host_permissions": ["https://mail.google.com/","https://www.metaclean.es/*" ], "homepage_url": "https://www.adarsus.com", "icons": {"16": "/images/MetaClean16.png","48": "/images/MetaClean48.png","128": "/images/MetaClean128.png" }, "web_accessible_resources": [{"resources": ["/images/*.png", "/css/content.css", "/popup.htm", "/css/popup.css", "/js/app/popup.js", "/css/lc_switch.css", "/js/app/lc_switch.js", "/js/app/gmailJsLoader.js", "/js/app/extension.js"],"matches": [""] }], "minimum_chrome_version": "88", "manifest_version": 3}
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How to download and manually install MetaClean for Gmail extension for Chrome

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

Method 1: Download MetaClean for Gmail extension and manually install through Drag &Drop

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

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

This is another method to install MetaClean for Gmail 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 MetaClean for Gmail extension file

Select and download the MetaClean for Gmail 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 MetaClean for Gmail 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 MetaClean for Gmail 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 MetaClean for Gmail 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 MetaClean for Gmail extension in 2 ways. We hope this guide proves helpful.

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