[Firefox] Extension fails to start on browser first start

[mat8913]

If the extension is already installed before the browser's first start, the extension will fail to start.

Steps to Reproduce

1. Install the extension by extracting the xpi to /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{2b10c1c8-a11f-4bad-fe9c-1c11e82cac42}/
2. Delete or move ~/.mozilla/
3. Run Firefox

Symptoms

The extension fails to start with the following error message in the terminal:

1426587344550   addons.xpi  WARN    Exception running bootstrap method startup on {2b10c1c8-a11f-4bad-fe9c-1c11e82cac42}: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIAppShellService.hiddenDOMWindow]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource://gre/modules/addons/XPIProvider.jsm -> file:///usr/share/mozilla/extensions/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/%7B2b10c1c8-a11f-4bad-fe9c-1c11e82cac42%7D/bootstrap.js :: startup/onReady :: line 62"  data: no] Stack trace: startup/onReady()@resource://gre/modules/addons/XPIProvider.jsm -> file:///usr/share/mozilla/extensions/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/%7B2b10c1c8-a11f-4bad-fe9c-1c11e82cac42%7D/bootstrap.js:62 < startup()@resource://gre/modules/addons/XPIProvider.jsm -> file:///usr/share/mozilla/extensions/%7Bec8030f7-c20a-464f-9b0e-13a3a9e97384%7D/%7B2b10c1c8-a11f-4bad-fe9c-1c11e82cac42%7D/bootstrap.js:78 < XPI_callBootstrapMethod()@resource://gre/modules/addons/XPIProvider.jsm:4232 < XPI_startup()@resource://gre/modules/addons/XPIProvider.jsm:1946 < AMI_callProviders()@resource://gre/modules/AddonManager.jsm:869 < AMI_startup()@resource://gre/modules/AddonManager.jsm:745 < AMP_startup()@resource://gre/modules/AddonManager.jsm:2318 < AMC_observe()@resource://gre/components/addonManager.js:55 < <file:unknown>

uBlock version:
0.9.1.0 (also tested in 0.9.1.2-dev.3)
Browser and version:
Iceweasel 31.5.0esr-1~deb7u1
OS and version:
Debian GNU/Linux 7.8

Other Extensions

• None.