Browser features description model

//Subject: Browser features description model
//Project: Feature Policy ( https://github.com/WICG/feature-policy )
//Related projects: https://github.com/w3c/WebAppSec
//See also: https://bugzilla.mozilla.org/show_bug.cgi?id=1494945
//Author: would be anonymous
//Version without comments: https://pastebin.com/tWqLKg7N
interface BrowserFeature
{
    boolean canAccessHardwareInfo;
    boolean canAccessSoftwareInfo;
    boolean canAccessLocalFilesystem;
    boolean canAccessExternalData; //camera, microphone, sensors, etc
    boolean canAccessNativeFunctions;
    boolean requiresPlugins;
    boolean isBrowserSpecific; //Vendor-specific features (non-standard)
    boolean hasOSSpecificImplementation;
    DOMString name;
};

interface NetworkFeature : BrowserFeature
{
};

interface ContentFeature : BrowserFeature
{
    sequence<DOMString> associatedMIMETypes;
    sequence<DOMString> associatedTagNames;
    sequence<DOMString> associatedAttributes;
    sequence<DOMString> associatedDOMProperties;
};

interface ProtocolSpecificNetworkFeature : NetworkFeature
{
    sequence<DOMString> associatedURISchemes;
};

//Cookie, Referer, etc
interface ProtocolHeaderFeature : ProtocolSpecificNetworkFeature
{
    sequence<DOMString> associatedHeaderNames;
};

//Any content features that produce network requests
interface ContentNetworkFeature : ContentFeature, NetworkFeature
{
}

interface CSSFeature : ContentFeature
{
    sequence<DOMString> associatedCSSProperties;
};

interface FeaturePermissionRule
{
    BrowserFeature feature;
    getter boolean allowed(DOMString propertyName);
};

interface NetworkFeaturePermissionRule : FeaturePermissionRule
{
    NetworkFeature feature;
    DOMString contentRequestMethod; //POST, GET, etc
    DOMString contentMIMETypeMask;
    DOMString contentSourceURIMask;
    DOMString originDomain;
    int originPort;
    DOMString originScheme;
    int frameNestingLevel;
};

//Each ScriptContext must have independent Global Environment
interface ScriptContext
{
    sequence<FeaturePermissionRule> featurePermissionRules;
    sequence<HTMLScriptElement> scripts;
    boolean derivePermissionRulesFromDocument; //derive sequence<FeaturePermissionRule> from Document
};