JS errors when theme and plugins disabled

I have been haviong problems with my Simplepress forum and in the process I have tried disabling all plugins and reverting to the wp2013 theme.

When I use the browser console in FF to look at js errors there is a long list of them, and Simplepress support is therefore probably correct in saying that these need to be fixed before they can deal with any other issues.

Would someone who knows a lot more than I do (that wont be hard) please look at this error list text below explain to me what the problem is likely to be and what to do about it.
Step by step basics if possible pleeeze 🙂
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Browser Console JS Errors Only – no plugins, 2013 theme
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TypeError: tab is undefined
Stack trace:
getTabId@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/tabs/utils.js:203:1
Tab<.id@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/tabs/tab-firefox.js:74:44
getNativeTab@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-49b4-8373-

fe32e9252800/web_clipper/lib/util.js:174:7
getTabWindow@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-49b4-8373-

fe32e9252800/web_clipper/lib/util.js:188:19
TabTracker.createTab/data.getContentDocument@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-

49b4-8373-fe32e9252800/web_clipper/lib/tracker.js:272:19
SimSearch.prototype.injectWorker/contentOpts.onDetach<@resource://gre/modules/commonjs/toolkit/loader.js ->

resource://e0b8c461-f8fb-49b4-8373-fe32e9252800/web_clipper/lib/sim-search.js:294:20
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/worker.js:185:3
dispatch@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/method/core.js:119:12
method/method/<@resource://gre/modules/commonjs/toolkit/loader.js ->

resource://gre/modules/commonjs/sdk/lang/functional/core.js:26:42
method@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/lang/functional/core.js:26:1
unloadWrapper@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/system/unload.js:41:7
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
receive@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/worker.js:77:18
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:123:45
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
processMessageReceived@resource://gre/modules/commonjs/toolkit/loader.js ->

resource://gre/modules/commonjs/sdk/remote/parent.js:75:32
log.js:63
TypeError: tab is undefined
Stack trace:
getTabId@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/tabs/utils.js:203:1
Tab<.id@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/tabs/tab-firefox.js:74:44
getNativeTab@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-49b4-8373-

fe32e9252800/web_clipper/lib/util.js:174:7
getTabWindow@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-49b4-8373-

fe32e9252800/web_clipper/lib/util.js:188:19
TabTracker.createTab/data.getContentDocument@resource://gre/modules/commonjs/toolkit/loader.js -> resource://e0b8c461-f8fb-

49b4-8373-fe32e9252800/web_clipper/lib/tracker.js:272:19
SimSearch.prototype.injectWorker/contentOpts.onDetach<@resource://gre/modules/commonjs/toolkit/loader.js ->

resource://e0b8c461-f8fb-49b4-8373-fe32e9252800/web_clipper/lib/sim-search.js:294:20
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
receive@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/worker.js:77:18
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:112:9
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
emitOnObject@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:123:45
emit@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/event/core.js:89:38
processMessageReceived@resource://gre/modules/commonjs/toolkit/loader.js ->

resource://gre/modules/commonjs/sdk/remote/parent.js:75:32
log.js:63
no element found request:1:1
TypeError: tab is undefined utils.js:203:0
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://play.google.com/log?

format=json&u=0. (Reason: CORS request failed). <unknown>
TypeError: tab is undefined utils.js:203:0
TypeError: tab is undefined utils.js:203:0
The connection to wss://lp-push-server-719.lastpass.com/ws/33549b607884c4ae895b72c84a0159c34f41213847b74762b2f56618033557dd

was interrupted while the page was loading. lastpass.js:1294:0
downloadable font: gasp: changed the version number to 1 (font-family: “Bitter” style:normal weight:normal stretch:normal src

index:1) source: http://fonts.gstatic.com/s/bitter/v7/X7ZHlbakqnL_pOH265Q8kg.woff2 css:1:12