Cannot update or install firetray

[allo-]

Update did not work for a long time, now i uninstalled and tried to reinstall / install from file and it does not work either.

On the console i get this error:

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A coding exception was thrown and uncaught in a Task.

Full message: TypeError: aAddon._repositoryAddon is null
Full stack: loadManifest_getCachedAddonByID@resource://gre/modules/addons/XPIProvider.jsm:5274:13
this.AddonRepository.getCachedAddonByID<@resource://gre/modules/addons/AddonRepository.jsm:575:7
TaskImpl_run@resource://gre/modules/Task.jsm:314:40
TaskImpl@resource://gre/modules/Task.jsm:275:3
createAsyncFunction/asyncFunction@resource://gre/modules/Task.jsm:249:14
loadManifest_cacheAddons@resource://gre/modules/addons/XPIProvider.jsm:5272:11
AddonRepo_cacheAddons@resource://gre/modules/addons/AddonRepository.jsm:682:9
loadManifest_getCachedAddonByID@resource://gre/modules/addons/XPIProvider.jsm:5271:1
this.AddonRepository.getCachedAddonByID<@resource://gre/modules/addons/AddonRepository.jsm:575:7
TaskImpl_run@resource://gre/modules/Task.jsm:314:40
TaskImpl@resource://gre/modules/Task.jsm:275:3
createAsyncFunction/asyncFunction@resource://gre/modules/Task.jsm:249:14
addRepositoryData@resource://gre/modules/addons/XPIProvider.jsm:5260:7
AI_loadManifest@resource://gre/modules/addons/XPIProvider.jsm:5341:5
AI_initLocalInstall@resource://gre/modules/addons/XPIProvider.jsm:4919:7
AI_createDownload@resource://gre/modules/addons/XPIProvider.jsm:5981:5
XPI_getInstallForURL@resource://gre/modules/addons/XPIProvider.jsm:3776:1
callProviderAsync@resource://gre/modules/AddonManager.jsm:235:12
AMI_getInstallForURL@resource://gre/modules/AddonManager.jsm:1743:1
AM_getInstallForURL@resource://gre/modules/AddonManager.jsm:2795:1
buildNextInstall@chrome://mozapps/content/extensions/extensions.js:3634:1
gDragDrop_onDrop@chrome://mozapps/content/extensions/extensions.js:3640:5
initialize/<@chrome://mozapps/content/extensions/extensions.js:121:5

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JS-Console:

Timestamp: 20.06.2015 23:02:03
Error: 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: Sat Jun 20 2015 22:59:43 GMT+0200 (CEST)
Full Message: TypeError: aAddon._repositoryAddon is null
Full Stack: loadManifest_getCachedAddonByID@resource://gre/modules/addons/XPIProvider.jsm:5274:13
this.AddonRepository.getCachedAddonByID<@resource://gre/modules/addons/AddonRepository.jsm:575:7
TaskImpl_run@resource://gre/modules/Task.jsm:314:40
TaskImpl@resource://gre/modules/Task.jsm:275:3
createAsyncFunction/asyncFunction@resource://gre/modules/Task.jsm:249:14
loadManifest_cacheAddons@resource://gre/modules/addons/XPIProvider.jsm:5272:11
AddonRepo_cacheAddons@resource://gre/modules/addons/AddonRepository.jsm:682:9
loadManifest_getCachedAddonByID@resource://gre/modules/addons/XPIProvider.jsm:5271:1
this.AddonRepository.getCachedAddonByID<@resource://gre/modules/addons/AddonRepository.jsm:575:7
TaskImpl_run@resource://gre/modules/Task.jsm:314:40
TaskImpl@resource://gre/modules/Task.jsm:275:3
createAsyncFunction/asyncFunction@resource://gre/modules/Task.jsm:249:14
addRepositoryData@resource://gre/modules/addons/XPIProvider.jsm:5260:7
AI_loadManifest@resource://gre/modules/addons/XPIProvider.jsm:5341:5
AI_initLocalInstall@resource://gre/modules/addons/XPIProvider.jsm:4919:7
AI_createDownload@resource://gre/modules/addons/XPIProvider.jsm:5981:5
XPI_getInstallForURL@resource://gre/modules/addons/XPIProvider.jsm:3776:1
callProviderAsync@resource://gre/modules/AddonManager.jsm:235:12
AMI_getInstallForURL@resource://gre/modules/AddonManager.jsm:1743:1
AM_getInstallForURL@resource://gre/modules/AddonManager.jsm:2795:1
buildNextInstall@chrome://mozapps/content/extensions/extensions.js:3634:1
gDragDrop_onDrop@chrome://mozapps/content/extensions/extensions.js:3640:5
initialize/<@chrome://mozapps/content/extensions/extensions.js:121:5

Source: resource://gre/modules/addons/XPIProvider.jsm
Line: 5274
Source:
5274