Fossa Guard enables end-to-end S/MIME encryption on top of Gmail® complementing it with industry standard privacy

Latest Version

Version
0.4.20
Update
May 16, 2021
Size
2.14MiB
Developer
fossa.me
Category
Users
1,000+
Rating
2.78571 ★
Manifest Version
2
Web Store Status
Languages Support
English
See more
Permissions
Storage
Identity
Identity.email
Https://www.googleapis.com/gmail/*
Https://www.google.com/m8/feeds/contacts/*
Https://fossa.me/
Http://*/
Https://*/
Tabs
Windows
See more

FossaGuard: Encrypt Gmail with S/MIME Extension

Secure e-mailing with Gmail becomes easy on Desktop and Android. Encrypt and Sign your Gmail messages with industry standard - S/MIME using Chrome, Yandex or Firefox browsers.

Fossa Server and Fossa Guard web extension provide secure mailing solution on top of Gmail (TM) following S/MIME specification.

Fossa Guard generates key pair within your browser then Fossa Server securely supplies you with personal X.509 certificate upon Certificate Signing Request (CSR) so that your private key always stays with you.

Use Fossa Guard extension to sign or to encrypt your email with X.509 certificate. The certificate is free and stays valid for 3 months (beta phase limitation).

Fossa Guard has own autonomous Compose dialog to avoid unsecured email content auto-saving.

Your private key is protected by pass-phrase and is replicated alongside with trusted certificates via your protected local user storage. Use Fossa Guard to get details on certificates in your repository.

Please refer to Privacy policy at https://fossa.me/policy
Read more

Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "__MSG_appName__", "short_name": "__MSG_appShortName__", "version": "0.4.20", "manifest_version": 2, "description": "__MSG_appDescription__", "icons": { "16": "images/icon-64.png", "128": "images/icon-128.png" }, "applications": { "gecko": { "id": "[email protected]", "strict_min_version": "65.0" } }, "browser_specific_settings": { "gecko": { "id": "[email protected]", "strict_min_version": "65.0" } }, "default_locale": "en", "background": { "scripts": [ "scripts/background.js" ], "persistent": false }, "browser_action": { "default_icon": { "19": "images/icon-64.png", "38": "images/icon-64.png" }, "default_title": "__MSG_appName__" }, "options_ui": { "page": "settings.html", "chrome_style": true, "open_in_tab": true }, "content_scripts": [ { "matches": [ "https://mail.google.com/*" ], "js": [ "scripts/contentscript.js" ], "css": [ "styles/contentstyle.css" ], "run_at": "document_end", "all_frames": false } ], "web_accessible_resources": [ "scripts/vendor.js", "compose.html", "styles/compose.css", "scripts/compose.js", "view.html", "styles/view.css", "scripts/view.js", "scripts/proxy.js", "images/*" ], "permissions": [ "storage", "identity", "identity.email", "https://www.googleapis.com/gmail/*", "https://www.google.com/m8/feeds/contacts/*", "https://fossa.me/", "http://*/", "https://*/", "tabs", "windows" ], "oauth2": { "client_id": "1001103668854-e5ilhmqqrg7hvs5n47t36njcg0a8fjrs.apps.googleusercontent.com", "scopes": [ "https://www.googleapis.com/auth/gmail.readonly", "https://www.googleapis.com/auth/gmail.send", "https://www.googleapis.com/auth/gmail.labels", "https://www.googleapis.com/auth/gmail.modify", "https://www.googleapis.com/auth/contacts.readonly" ] }}
Read more

How to download and manually install FossaGuard: Encrypt Gmail with S/MIME extension for Chrome

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

Method 1: Download FossaGuard: Encrypt Gmail with S/MIME extension and manually install through Drag &Drop

If you ever need to manually install a FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME Extension by clicking the "Download CRX" button on the website.

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

This is another method to install FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME extension file

Select and download the FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME 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 FossaGuard: Encrypt Gmail with S/MIME extension in 2 ways. We hope this guide proves helpful.

Similar Extensions

icon

Encrypt any email with CipherMail Extension · Productivity 1,000+ 6 ★ 683KiB

icon

Lockmagic Gmail Encryption Extension · Social & Communication 1,000+ 10 ★ 1.62MiB

icon

PassLok Universal Extension · Productivity 1,000+ 0 ★ 224KiB

icon

SendSafely Encryption for Chrome and Gmail Extension · Social & Communication 1,000+ 15 ★ 1.48MiB

icon

E-mail Encryptor for GMail Extension · Productivity 1,000+ 4 ★ 287KiB

icon

KodaMail Extension · Social & Communication 1,000+ 1 ★ 980KiB

icon

Message Secure Send Extension · Productivity 1,000+ 0 ★ 87.51KiB

icon

ZixEncrypt Email Encryption Extension · Productivity 1,000+ 0 ★ 679KiB

icon

HID Credential Management Extension Extension · Productivity 1,000+ 13 ★ 40.67KiB

icon

FlowCrypt: Encrypt Gmail with PGP Extension · Social & Communication 1,000+ 362 ★ 3.39MiB

icon

AnyCrypt Extension · Social & Communication 1,000+ 2 ★ 1.13MiB

icon

TLSA Validator Extension · Social & Communication 1,000+ 23 ★ 95.55KiB

icon

Inline PGP Extension · Social & Communication 1,000+ 3 ★ 3.48MiB

icon

Mymail-Crypt for Gmail™ Extension · Social & Communication 1,000+ 150 ★ 427KiB

icon

PassLok for Email Extension · Productivity 1,000+ 2 ★ 202KiB

icon

Keybase Extension · Social & Communication 1,000+ 65 ★ 434KiB

icon

DNSSEC Validator Extension · Social & Communication 1,000+ 28 ★ 87.29KiB

icon

Easy KeyBase.io Encryption Extension · Accessibility 1,000+ 6 ★ 829KiB

icon

Certificate Info Extension · Developer Tools 1,000+ 20 ★ 18.09KiB

icon

Save as MHTML (MIME HTML) Extension · Productivity 1,000+ 10 ★ 19.23KiB

icon

Cloudpath Certificate Generator Extension · Accessibility 1,000+ 11 ★ 270KiB

icon

Local PGP - Browser Encryption and Decryption Extension · Social & Communication 1,000+ 6 ★ 193KiB

icon

XQ Secure Gmail Extension · Social & Communication 1,000+ 7 ★ 615KiB

icon

Mailvelope Extension · Social & Communication 1,000+ 433 ★ 2.97MiB

User reviews

icon

Franci Šacer (ID: 000000f6c0756103) Voted 3 ★ - Updated 06/10/2022 Worked before but now it cannot detect logged in user in gmail it seems, cause it says I am logged in with null

icon

Carlos C. (ID: 0000000a9197b07a) Voted 3 ★ - Updated 01/19/2021 Puedes leer la valoración en español mas abajo. ENGLISH The good ... -You can sign the emails with the certificate that they generate and it is well integrated into Gmail. - You can include your own certificate (I haven't tried it) The bad ... - The certificate with which it is signed is not recognized as valid by mail clients (for example Thunderbird) because it is not issued by a trusted CA. Not good not bad ... - The permits that must be given are many, but at least they seem reasonable. - I don't trust uploading my own certificate to a server. The summary... - If the certificates were issued by a trusted CA I would use it, but sending emails that carry a certificate notice seems ugly to me. I can't ask my senders to include a CA on their computers because I'm going to send them emails. ESPAÑOL Lo bueno ... -Puedes firmar los correos con el certificado que te generan y está bien integrado en Gmail. - Puedes incluir tu propio certificado (no lo he probado) Lo malo ... - El certificado con el que se firma no es reconocido como válido por los clientes de correo (por ejemplo Thunderbird) porque no lo emite una CA de confianza. Ni bueno ni malo ... - Los permisos que hay que darle son muchos, pero al menos parecen razonables. - No me fio de subir un certificado emitido para mi email por una CA de confianza a un servidor. Debería poder dar la opción de firmar en local. El resumen... - Si los certificados estuviesen emitidos por una CA de confianza la usaría, pero enviar emails que llevan un aviso de certificado me parece feo. No puedo pedirle a mis remitentes que incluyan una CA en sus equipos porque yo les vaya a enviar emails.

icon

Nathan Kaiser (ID: 00000085d4bc7bdd) Voted 2 ★ - Updated 07/28/2018 it just doesn't work. It's just too complicated. Tried this, tried that, free version, paid - it would just never work, always something new coming up. Not mature yet.

icon

Marco Uras (ID: 000000dd37135151) Voted 1 ★ - Updated 04/12/2018 beim schreiben der Empfänger-Email ploppt nur kurz ein Fenster auf um das Konto auszuwählen. So kann man keine Mail schreiben.

icon

William Stewart (ID: 000000150ff19f2e) Voted 2 ★ - Updated 11/01/2017 I had high hopes for this but entering email addresses by hand (instead of them popping up as they do in Gmail) was an issue, complicated by the email address always showing one less letter than I actually typed. That was quite annoying. ***UPDATE: This aspect suddenly started working properly after exiting my browser and restarting it, and logging in to Chrome again. *** I then attempted to send an email from within the extension, and it warned me that it would be sent unencrypted and asked me if I wanted to continue. I chose to continue but it then failed telling me that the recipient wasn't secure (diff wording). So it could not even send an email out insecurely. This has proven to be frustrating and a waste of my time. Too bad.