Errors on browser start in Chrome

[ghostwords]

When your Chrome browser is set up to remember open windows/tabs, Privacy Badger tends to run repeatedly into errors on browser start, probably as the remembered tabs are being loaded with Privacy Badger not yet fully initialized.

Some error strings (see also screenshots below):

• Can't initialize cache from getBadgerStorageObject. You are using this API improperly
• Error in event handler for runtime.onMessage: TypeError: Cannot read property 'getItem' of undefined
• Error in event handler for webRequest.onBeforeRequest/6: TypeError: Cannot read property 'getItem' of undefined
• Error in event handler for webRequest.onHeadersReceived/3: TypeError: Cannot read property 'getItem' of undefined
• Error in event handler for webRequest.onBeforeSendHeaders/2: TypeError: Cannot read property 'getItem' of undefined

DNT policy checking seems to produce errors related to storage not yet being ready too. You have to update timestamps for some domains to be ready for rechecking to see these.

The fix would probably be to delay attaching listeners until Privacy Badger is actually ready.

This should be relatively low priority since PB seems to function fine afterwards.

Firefox is probably similarly affected, but I haven't checked yet.