Can anyone interpret this or know what's wrong ? error occurred while processing 'getCachedMessages: out of memory main.js:1662 "onPacket threw an exception: Error: Server did not specify an actor, dropping packet: {"error":"unknownError","message":"error occurred while processing 'getCachedMessages: out of memory"} Stack: onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/client/main.js:944:9 send/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:570:13 exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14 exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14 Line: 944, column: 9" ThreadSafeDevToolsUtils.js:88 timeout: Connection timeout. Check the Error Console on both ends for potential error messages. Reopen the Web Console to try again. A promise chain failed to handle a rejection. Did you forget to '.catch', or did you forget to 'return'? See https://developer.mozilla.org/Mozilla/JavaScript_code_modules/Promise.jsm/Promise Date: Thu Aug 31 2017 03:54:36 GMT+0200 (Romance Standard Time) Full Message: [object Object] Full Stack: JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: register :: line 199 JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: completePromise :: line 711 JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: process :: line 958 JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: walkerLoop :: line 806 JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: scheduleWalkerLoop/< :: line 742 (unknown) Attempt to set a forbidden header was denied: Connection 4154460097-lcs_client_bin.js:99:385 Content Security Policy: The page’s settings blocked the loading of a resource at self (“script-src 'nonce-NhxFDY/wnL0Z6WYNzhngqYQ/csk' 'unsafe-inline' 'strict-dynamic' https: http: 'unsafe-eval'”). Source: onfocusin attribute on DIV element. widget Content Security Policy: The page’s settings blocked the loading of a resource at self (“script-src 'nonce-NhxFDY/wnL0Z6WYNzhngqYQ/csk' https://notifications.google.com 'unsafe-eval' https://apis.google.com https://ssl.gstatic.com https://www.google.com https://www.gstatic.com”). Source: onfocusin attribute on DIV element. document.getElementsByTagName(...)[0] is undefined 112519.user.js:35:11 expected expression, got end of script Sites_like_dictionary.com_hanging_when_contacting_other_sites_on_the_star.user.js:5:128 Syntax error, unrecognized expression: ##.gb_b jquery-latest.min.js:2:12720 Key event not available on some keyboard layouts: key=“e” modifiers=“alt control” id=“colorfulTabsEnd” browser.xul Key event not available on some keyboard layouts: key=“b” modifiers=“alt control” id=“colorfulTabsBegining” browser.xul Key event not available on some keyboard layouts: key=“t” modifiers=“alt control” id=“colorfulTabsOpen” browser.xul Key event not available on some keyboard layouts: key=“w” modifiers=“accel,alt” id=“closerepeatedtabs-key” browser.xul Key event not available on some keyboard layouts: key=“l” modifiers=“accel, alt” id=“UIEnhancerKeyID” browser.xul Key event not available on some keyboard layouts: key=“i” modifiers=“accel,alt,shift” id=“key_browserToolbox” browser.xul Key event not available on some keyboard layouts: key=“r” modifiers=“accel,alt” id=“key_toggleReaderMode”