nsIPropertyBag
xpcom/ds/nsipropertybag.idlscriptable this interface is used to store a set of properties.
... inherits from: nsisupports last changed in gecko 1.0 method overview nsivariant getproperty(in astring name); attributes attribute type description enumerator nsisimpleenumerator get a nsisimpleenumerator whose elements are nsiproperty objects.
...to do this use nsipropertybag: services.sysinfo.getproperty("version"); //output 5.1 services.sysinfo.getproperty("name"); //output windows_nt services.sysinfo.getproperty("arch"); //output x86 services.sysinfo.getproperty("haswindowstouchinterface"); //outputs false or true if windows touch is there consult the uxp repo (//github.com/realityripple/uxp/blob/master/xpcom/base/nssysteminfo.cpp) for the properties supported...

nsIPropertyBag2
xpcom/ds/nsipropertybag2.idlscriptable this interface extends nsipropertybag with some methods for getting properties in specific formats.
... inherits from: nsipropertybag last changed in gecko 1.0 method overview nsivariant get(in astring prop); acstring getpropertyasacstring(in astring prop); astring getpropertyasastring(in astring prop); autf8string getpropertyasautf8string(in astring prop); boolean getpropertyasbool(in astring prop); double getpropertyasdouble(in astring prop); print32 getpropertyasint32(in astring prop); print64 getpropertyasint64(in astring prop); void getpropertyasinterface(in astring prop, in nsiidref iid, [iid_is(iid), retval] out nsqiresult result); pruint32 getpropertyasuint32(in astring prop); pruint64 getpropertyasuint64(in astring prop); prbool haskey(in astring prop); methods get() this m...

nsIProperty
xpcom/ds/nsiproperty.idlscriptable please add a summary to this article.

Index
725 nsiloginmetainfo firefox 3.5, interfaces, interfaces:scriptable, login manager, xpcom, xpcom api reference, xpcom interface reference you can specifically modify these values by passing changes into nsiloginmanager.modifylogin() using an nsipropertybag2 object as the input.
... 853 nsiproperty interfaces, interfaces:scriptable, xpcom, xpcom api reference, xpcom interface reference no summary!
... 854 nsipropertybag interfaces, interfaces:scriptable, xpcom, xpcom api reference, xpcom interface reference get a property value for the given name.
...And 2 more matches

nsIContentPrefService
ce, use: var contentprefservice = components.classes["@mozilla.org/content-pref/service;1"] .getservice(components.interfaces.nsicontentprefservice); method overview void addobserver(in astring aname, in nsicontentprefobserver aobserver); nsivariant getpref(in nsivariant agroup, in astring aname, [optional] in nsicontentprefcallback acallback); nsipropertybag2 getprefs(in nsivariant agroup); nsipropertybag2 getprefsbyname(in astring aname); boolean haspref(in nsivariant agroup, in astring aname); void removegroupedprefs(); void removeobserver(in astring aname, in nsicontentprefobserver aobserver); void removepref(in nsivariant agroup, in astring aname); void removeprefsbyname(in astring aname)...
... nsipropertybag2 getprefs( in nsivariant agroup ); parameters agroup the group whose preferences are to be retrieved; this may be specified as either a uri or as a string; in either case, the group consists of all sites matching the hostname portion of the specified uri.
... return value the result is an nsipropertybag2 containing the preferences and their values.
...And 2 more matches

nsILoginManager
void getalllogins([optional] out unsigned long count, [retval, array, size_is(count)] out nsilogininfo logins); boolean getloginsavingenabled(in astring ahost); void modifylogin(in nsilogininfo oldlogin, in nsisupports newlogindata); void removealllogins(); void removelogin(in nsilogininfo alogin); void searchlogins(out unsigned long count, in nsipropertybag matchdata, [retval, array, size_is(count)] out nsilogininfo logins); void setloginsavingenabled(in astring ahost, in boolean isenabled); methods addlogin() stores a new login in the login manager.
... if newlogindata is a nsipropertybag, only the specified properties will be changed.
...this may be specified as either an nsilogininfo or an nsipropertybag2 object.
... void searchlogins( out unsigned long count, in nsipropertybag matchdata, [retval, array, size_is(count)] out nsilogininfo logins ); parameters count the number of elements in the returned array.

nsILoginManagerStorage
ed long count, [retval, array, size_is(count)] out nsilogininfo logins); boolean getloginsavingenabled(in astring ahost); void init(); void initwithfile(in nsifile ainputfile, in nsifile aoutputfile); void modifylogin(in nsilogininfo oldlogin, in nsisupports newlogindata); void removealllogins(); void removelogin(in nsilogininfo alogin); void searchlogins(out unsigned long count, in nsipropertybag matchdata, [retval, array, size_is(count)] out nsilogininfo logins); void setloginsavingenabled(in astring ahost, in boolean isenabled); attributes attribute type description uibusy boolean true when a master password prompt is being shown.
...if newlogindata is a nsipropertybag, only the properties specified in the nsipropertybag are changed in oldlogin and its corresponding nsiloginmetainfo.
...this may be specified as either an nsilogininfo or an nsipropertybag2 object.
...void searchlogins( out unsigned long count, in nsipropertybag matchdata, [retval, array, size_is(count)] out nsilogininfo logins ); parameters count the number of elements in the logins array.

nsIWritablePropertyBag2
xpcom/ds/nsiwritablepropertybag2.idlscriptable this interface extends nsipropertybag2 with methods for setting properties.
... 1.0 66 introduced gecko 1.8 inherits from: nsipropertybag2 last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) method overview void setpropertyasacstring(in astring prop, in acstring value); void setpropertyasastring(in astring prop, in astring value); void setpropertyasautf8string(in astring prop, in autf8string value); void setpropertyasbool(in astring prop, in boolean value); void setpropertyasdouble(in astring prop, in double value); void setpropertyasint32(in astring prop, in print32 value); void setpropertyasint64(in astring prop, in print64 value); void setpropertyasinterface(in astring prop, in nsisupports value); void setpropertyasuint32(in astring prop, in pruint32 ...
... see also nsipropertybag2 ...

strings - Archive of obsolete content
the enumeration contains nsipropertyelement objects.

stringbundle - Archive of obsolete content
the enumeration contains nsipropertyelement objects.

Services.jsm
ript subscript loader service scriptsecuritymanager nsiscriptsecuritymanager script security manager search nsibrowsersearchservice browser search service startup nsiappstartup application startup service storage mozistorageservice storage api service strings nsistringbundleservice string bundle service sysinfo nsipropertybag2 system info service telemetry nsitelemetry telemetry service tm nsithreadmanager thread manager service urifixup nsiurifixup uri fixup service urlformatter nsiurlformatter url formatter service vc nsiversioncomparator version comparator service wm nsiwindowmediator window mediator service ww ...

nsIChannel
in earlier versions callers could get the "content-length" property as 64-bit value by queryinterfacing the channel to nsipropertybag2, if that interface is exposed by the channel.

nsILoginMetaInfo
1.0 66 introduced gecko 1.9.1 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) you can specifically modify these values by passing changes into nsiloginmanager.modifylogin() using an nsipropertybag2 object as the input.

nsIStringBundle
return value returns a nsisimpleenumerator of all nsipropertyelement entries in the string bundle.