Códigos complicados

Olá! Tava dando uma olhada no código fonte da página inicial do Facebook (aquela em que se faz o login) e me deparei com isso:

<script>(require("ServerJSDefine")).handleDefines([["URLFragmentPreludeConfig",[],{"incorporateQuicklingFragment":true,"hashtagRedirect":true},137],["BootloaderConfig",[],{},329],["CSSLoaderConfig",[],{"timeout":5000},619],["CurrentUserInitialData",[],{"USER_ID":"0","ACCOUNT_ID":"0"},270],["SiteData",[],{"revision":1548948,"tier":"","push_phase":"V3","pkg_cohort":"EXP1:DEFAULT","vip":"31.13.73.1"},317],["UserAgentData",[],{"browserArchitecture":"32","browserFullVersion":"39.0.2171.95","browserMinorVersion":0,"browserName":"Chrome","browserVersion":39,"deviceName":"Unknown","engineName":"WebKit","engineVersion":"537.36","platformArchitecture":"32","platformName":"Mac OS X","platformVersion":"10.7","platformFullVersion":"10.7.5"},527],["CurrentCommunityInitialData",[],{},490],["DTSGInitialData",[],{},258],["ISB",[],{},330],["LSD",[],{"token":"AVokTzZh"},323],["BanzaiConfig",[],{"EXPIRY":86400000,"MAX_SIZE":10000,"MAX_WAIT":150000,"RESTORE_WAIT":150000,"blacklist":["time_spent"],"gks":{"adapterhooks":true,"boosted_pagelikes":true,"boosted_posts":true,"boosted_website":true,"jslogger":true,"mercury_send_error_logging":true,"miny_compression":true,"pages_client_logging":true,"time_spent_bit_array":true,"time_spent_debug":true,"useraction":true,"videos":true,"visibility_tracking":true,"vitals":true,"allow_userid_mismatch":true}},7],["AsyncRequestConfig",[],{"retryOnNetworkError":"1"},328],["FbtLogger",[],{"logger":null},288],["FbtQTOverrides",[],{"overrides":{"1_f6f32d47f40ef878e082b3231d06b2d4":"Problemas ao se conectar?","1_4f9484aa4d960982e51037873dbfac75":"Problemas ao se conectar?"}},551],["EagleEyeConfig",[],{"seed":"0Cz1","sessionStorage":1},294],["TrackingConfig",[],{"domain":"https:\/\/pixel.facebook.com"},325],["ErrorSignalConfig",[],{"uri":"https:\/\/error.facebook.com\/common\/scribe_endpoint.php"},319],["InitialServerTime",[],{"serverTime":1420236565000},204],["UFIConstants",[],{"UFIActionType":{"COMMENT_LIKE":"fa-type:comment-like","COMMENT_SET_SPAM":"fa-type:mark-spam","DELETE_COMMENT":"fa-type:delete-comment","DISABLE_COMMENTS":"fa-type:disable-comments","LIVE_DELETE_COMMENT":"fa-type:live-delete-comment","LIKE_ACTION":"fa-type:like","SUBSCRIBE_ACTION":"fa-type:subscribe","REMOVE_PREVIEW":"fa-type:remove-preview","MARK_COMMENT_SPAM":"fa-type:mark-spam","CONFIRM_COMMENT_REMOVAL":"fa-type:confirm-remove","TRANSLATE_COMMENT":"fa-type:translate-comment","COMMENT_LIKECOUNT_UPDATE":"fa-type:comment-likecount-update","ADD_COMMENT_ACTION":"fa-type:add-comment"},"UFICommentOrderingMode":{"CHRONOLOGICAL":"chronological","RANKED_THREADED":"ranked_threaded","TOPLEVEL":"toplevel","RECENT_ACTIVITY":"recent_activity","FEATURED":"featured","UNSUPPORTED":"unsupported"},"UFIFeedbackSourceType":{"PROFILE":0,"NEWS_FEED":1,"OBJECT":2,"MOBILE":3,"EMAIL":4,"PROFILE_APPROVAL":10,"TICKER":12,"NONE":13,"INTERN":14,"ADS":15,"EVENT_GOING_FLYOUT":16,"PHOTOS_SNOWLIFT":17,"NOTIFICATION_FLYOUT":18,"PHOTOS_SNOWFLAKE":20},"UFIPayloadSourceType":{"UNKNOWN":0,"INITIAL_SERVER":1,"LIVE_SEND":2,"USER_ACTION":3,"ENDPOINT_LIKE":10,"ENDPOINT_COMMENT_LIKE":11,"ENDPOINT_ADD_COMMENT":12,"ENDPOINT_EDIT_COMMENT":13,"ENDPOINT_DELETE_COMMENT":14,"ENDPOINT_COMMENT_SPAM":16,"ENDPOINT_REMOVE_PREVIEW":17,"ENDPOINT_ID_COMMENT_FETCH":18,"ENDPOINT_COMMENT_FETCH":19,"ENDPOINT_TRANSLATE_COMMENT":20,"ENDPOINT_BAN":21,"ENDPOINT_SUBSCRIBE":22,"ENDPOINT_COMMENT_LIKECOUNT_UPDATE":23,"ENDPOINT_DISABLE_COMMENTS":24,"ENDPOINT_ACTOR_CHANGE":25},"UFIStatus":{"DELETED":"status:deleted","SPAM":"status:spam","SPAM_DISPLAY":"status:spam-display","LIVE_DELETED":"status:live-deleted","FAILED_ADD":"status:failed-add","FAILED_EDIT":"status:failed-edit","PENDING_EDIT":"status:pending-edit"},"attachmentTruncationLength":80,"commentTruncationLength":420,"commentTruncationMaxLines":3,"commentTruncationPercent":0.6,"commentURLTruncationLength":60,"defaultPageSize":50,"infiniteScrollRangeForQANDAPermalinks":1000,"minCommentsForOrderingModeSelector":2,"unavailableCommentKey":"unavailable_comment_key"},240]]);new (require("ServerJS"))().handle({"require":[["markJSEnabled"],["lowerDomain"],["URLFragmentPrelude"],["Primer"],["Bootloader"]]});</script>
Queria entender pra que serve esses scripts. Alguém pode me dizer?

MUITO OßRIGAD0