A list of chrome:// URLs, retrieved through strings //usr/lib/firefox/libxul.so | grep chrome://

firefox-chrome-urls.txt

chrome://global/locale/global-strres.properties
chrome://branding/locale/brand.properties
chrome://global/locale/commonDialogs.properties
chrome://global/locale/css.properties
chrome://global/locale/dom/dom.properties
chrome://global/locale/intl.properties
chrome://global/locale/layout/HtmlForm.properties
chrome://global/locale/layout/htmlparser.properties
chrome://global/locale/layout_errors.properties
chrome://global/locale/mathml/mathml.properties
chrome://global/locale/printing.properties
chrome://global/locale/security/csp.properties
chrome://global/locale/security/security.properties
chrome://global/locale/svg/svg.properties
chrome://global/locale/xbl.properties
chrome://global/locale/xul.properties
chrome://necko/locale/necko.properties
chrome://necko/locale/necko.properties
chrome://global/skin/dirListing/dirListing.css
chrome://global/skin/about.css
chrome://global/skin/aboutCache.css
chrome://global/content/aboutCache.js
chrome://global/skin/about.css
chrome://global/skin/aboutCacheEntry.css
chrome://global/locale/commonDialogs.properties
chrome://mochikimozURLcachev002
chrome://mochikit/
chrome://global/locale/nsWebBrowserPersist.properties
chrome://global/locale/security/caps.properties
chrome://global/locale/layout/xmlparser.properties
chrome://global/locale/browser.properties
chrome://global-platform/locale/platformKeys.properties
chrome://global/locale/css.properties
chrome://global/locale/xbl.properties
chrome://global/locale/xul.properties
chrome://global/locale/layout_errors.properties
chrome://global/locale/layout/HtmlForm.properties
chrome://global/locale/printing.properties
chrome://global/locale/dom/dom.properties
chrome://global/locale/layout/htmlparser.properties
chrome://global/locale/svg/svg.properties
chrome://branding/locale/brand.properties
chrome://global/locale/commonDialogs.properties
chrome://global/locale/mathml/mathml.properties
chrome://global/locale/security/security.properties
chrome://necko/locale/necko.properties
chrome://global/locale/appstrings.properties
chrome://global/content/filepicker.properties
chrome://global/locale/layout/MediaDocument.properties
chrome://branding/locale/brand.properties
chrome://global/locale/security/csp.properties
chrome://global/content/xml/XMLPrettyPrint.xsl
chrome://global/locale/xslt/xslt.properties
chrome://branding/locale/brand.properties
chrome://global/locale/filepicker.properties
chrome://global/locale/printdialog.properties
chrome://global/skin/scrollbars.css
chrome://global/content/xul.css
chrome://global/content/minimal-xul.css
chrome://global/locale/css.properties
chrome://global/locale/keys.properties
chrome://global/content/aboutAbout.xhtml
chrome://mozapps/content/extensions/extensions.xul
chrome://global/content/buildconfig.html
chrome://global/content/aboutCheckerboard.xhtml
chrome://global/content/config.xul
chrome://global/content/crashes.xhtml
chrome://global/content/license.html
chrome://branding/content/about.png
chrome://global/content/aboutMemory.xhtml
chrome://global/content/mozilla.xhtml
chrome://global/content/netError.xhtml
chrome://global/content/aboutNetworking.xhtml
chrome://global/content/aboutPerformance.xhtml
chrome://global/content/plugins.html
chrome://global/content/aboutServiceWorkers.xhtml
chrome://global/content/aboutProfiles.xhtml
chrome://global/content/aboutSupport.xhtml
chrome://global/content/aboutTelemetry.xhtml
chrome://global/content/aboutUrlClassifier.xhtml
chrome://global/content/aboutwebrtc/aboutWebrtc.html
chrome://global/locale/appstrings.properties
chrome://branding/locale/brand.properties
chrome://browser/content/browser.xul
chrome://global-platform/locale/accessible.properties
chrome://pipnss/locale/pipnss.properties
chrome://pipnss/locale/nsserrors.properties
chrome://pippki/locale/pippki.properties
chrome://pippki/content/changepassword.xul
chrome://pippki/content/downloadcert.xul
chrome://pippki/content/clientauthask.xul
chrome://pippki/content/setp12password.xul
chrome://pippki/content/createCertInfo.xul
chrome://pippki/content/choosetoken.xul
chrome://pippki/content/protectedAuth.xul
chrome://global/content/alerts/alert.xul
chrome://mozapps/skin/places/defaultFavicon.svg
chrome://global/skin/icons/warning.svg
chrome://places/locale/places.properties
chrome://global/content/notfound.wav
chrome://global/content/printProgress.xul
chrome://global/content/printPreviewProgress.xul
chrome://global/locale/extensions.properties
chrome://mozapps/locale/profile/profileSelection.properties
chrome://global/content/resetProfileProgress.xul
chrome://mozapps/locale/profile/profileSelection.properties
chrome://mozapps/content/profile/profileSelection.xul
chrome://autoconfig/locale/autoconfig.properties
chrome://browser/content/aboutNetError-new.xhtml
chrome://browser/content/blockedSite.xhtml
chrome://browser/content/aboutNetError.xhtml
chrome://browser/content/aboutTabCrashed.xhtml
chrome://browser/content/policies/aboutPolicies.xhtml
chrome://browser/content/aboutPrivateBrowsing.xhtml
chrome://global/content/aboutRights.xhtml
chrome://browser/content/aboutRobots.xhtml
chrome://browser/content/aboutSessionRestore.xhtml
chrome://browser/content/aboutWelcomeBack.xhtml
chrome://browser/content/aboutLibrary.xhtml
chrome://pocket/content/panels/saved.html
chrome://pocket/content/panels/signup.html
chrome://browser/content/preferences/in-content/preferences.xul
chrome://browser/content/downloads/contentAreaDownloadsView.xul
chrome://global/content/reader/aboutReader.html
chrome://browser/content/aboutRestartRequired.xhtml