Harmless SystemsSecurity.txt Browser Extension
A browser extension for displaying security.txt and humans.txt files.What is security.txt?
security.txt is a proposed standard that provides a means for websites and software authors to define their security policies. This is useful to security researchers or anyone who would like to responsibly disclose a vulnerability to the owners of the website or software. You can view our security.txt file as an example.
What is humans.txt?
humans.txt is a less formal initiative for providing human-readable information about the authors of the website. You can view our humans.txt file as an example.
How does the browser extension work?
As you browse the web and navigate to different websites, the browser extension checks the website to see if it supports either type of file.
If it does, an 
icon is shown in the URL bar. You can click this icon to view more details about the text files that were located.
How to install
Firefox - Install from Mozilla Add-Ons
Chrome and 
Chromium- Install from the Chrome Web Store
Edge- Install from the Microsoft Edge Addon Store
Install From Source- Source code is available on Github and Sourcehut
Comparison to existing extensions
Let's compare our security.txt extension to some other extensions with similar features. We found: infotxt, Security.txt Parser, and Permission to Hack.
The browser compatibility matrix below is based on the respective browser's official "extension store". For example, if the extension was available in the Chrome Web Store, it's marked as compatible (✅) if it was not found in the respective store it's marked as unknown (❓).
| Security.txt | infotxt | Security.txt Parser | Permission to Hack | |
|---|---|---|---|---|
| Firefox | ✅ | ❓ | ✅ | ✅ |
| Chrome | ✅ | ✅ | ❓ | ❓ |
| Opera | ⏳ | ❓ | ❓ | ❓ |
| Edge | ✅ | ❓ | ❓ | ❓ |
| Safari | ❌ | ❌ | ❌ | ❌ |
| Open Source License | ✅ | ✅ | ✅ | ✅ |
| humans.txt Support | ✅ | ❌ | ❌ | ❌ |
| Automatic Scanning | ✅ | ✅ | ❌ | ✅ |
| Fallback to security.txt if .well-known/security.txt is absent | ✅ | ❌ | ✅ | ❌ |
| Multiple Translations | ✅ | ❌ | ❌ | ❌ |
| If you are aware of another extension in this category, contact us and we'll add it to this table. | ||||
Some examples found in the wild
Vimeo
security.txt
Contact: mailto:security@vimeo.com
Encryption: https://vimeo.com/.well-known/security-pubkey.txt
Acknowledgements: https://vimeo.com/about/security
Policy: https://hackerone.com/vimeo
Signature: https://vimeo.com/.well-known/security.txt.sig
Hiring: https://vimeo.com/jobs
Github
security.txt
Contact: https://hackerone.com/github
Acknowledgments: https://bounty.github.com/bounty-hunters.html
Preferred-Languages: en
Canonical: https://github.com/.well-known/security.txt
Policy: https://bounty.github.com
Slack
humans.txt
,--. ,--.
((O ))--((O ))
,'_`--'____`--'_`.
_: ____________ :_
| | ||::::::::::|| | |
| | ||::::::::::|| | |
| | ||::::::::::|| | |
|_| |/__________\| |_|
|________________|
__..-' `-..__
.-| : .----------------. : |-.
,\ || | |\______________/| | || /.
/`.\:| | || __ __ __ || | |;/,'\
:`-._\;.| || '--''--''--' || |,:/_.-':
| : | || .----------. || | : |
| | | || '-SLACKBOT-' || | | |
| | | || _ _ _ || | | |
:,--.; | || (_) (_) (_) || | :,--.;
(`-'|) | ||______________|| | (|`-')
`--' | |/______________\| | `--'
|____________________|
`.________________,'
(_______)(_______)
(_______)(_______)
(_______)(_______)
(_______)(_______)
| || |
~^^^~^^~~~^^^~'--------''--------'^^^~^^^~^^~^^~^^~^
Slack is made by Slack Technologies: https://slack.com
Netflix
humans.txt
|\ |\ | | /| /|
|\ |\ | +---------------------------------------------+ | /| /|
|\ |\ | | . | | /| /|
|\ |\ | | * _ _ _ | | /| /|
|\ |\ | | |\ | |_ | |_ | | \/ * | | /| /|
|\ |\ | | | \| |_ | | |_ | /\ | | /| /|
|\ |\ | | . | | /| /|
|\ |\ | | . | | /| /|
|\ |\ | | . . STARRING . | | /| /|
|\ |\ | | | | /| /|
|\ |\ | | An all-star cast of talented | | /| /|
|\ |\ | | designers & engineers | | /| /|
|\ |\ | | * | | /| /|
|\ |\ | | * | | /| /|
|\ |\ | | JOIN US! . | | /| /|
|\ |\ | | . | | /| /|
|\ |\ | | jobs.netflix.com . | | /| /|
|\ |\ | | . . | | /| /|
|\ |\ | | | | /| /|
|\ |\ | +---------------------------------------------+ | /| /|
|\ |\ | | /| /|
|\ |\ |=======================================================| /| /|
|\ |\__/ \__/| /|
|__/ _ \__|
| _[_]_ 88 _ _ o _ (_) |
( ) s( )s ( ) / ( ) -#- ( ) =()
.----. .----. .----. .----. .----. .----. .----. .----.
| | | | | | | | | | | | | | | |
_ _ __ _ __ _ _
{ } [ ] q p <( )> ( ) ~( )~ ( )
.----. .----. .----. .----. .----. .----. .----. .----. .----.
| | | | | | | | | | | | | | | | | |