xmonad logout after opening of firefox

[mrityunjay23]

I am new Xmonad user. I have installed Xmonad thorough Software center.

When I open firefox in ubuntu Genome Xmonad through command prompt (firefox &) then it gives following error on command prompt. After little time my Xomand gets log out.


mrityunjay@mrityunjay-A7GMX-K:~$ firefox &
[1] 5546
mrityunjay@mrityunjay-A7GMX-K:~$
(process:5546): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

(firefox:5546): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised

(firefox:5546): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised

(firefox:5546): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised

(firefox:5546): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised
console.error: youtubetmadblock:
Object
- message = Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIXPCComponents_Utils.import]
- fileName = undefined
- lineNumber = 3
- stack = @undefined:3:NaN|@resource://jid1-w4wg5njhx4ljzr-at-jetpack/main/firefox/firefox.js:3:20|@resource://jid1-w4wg5njhx4ljzr-at-jetpack/main/youtube.js:2:49|run@resource://gre/modules/commonjs/sdk/addon/runner.js:145:19|startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:86:7|Handler.prototype.process@resource://gre/modules/Promise-backend.js:867:23|this.PromiseWalker.walkerLoop@re source://gre/modules/Promise-backend.js:746:7|this.PromiseWalker.scheduleWalker Loop/<@resource://gre/modules/Promise-backend.js:688:37|openModalWindow@resource://gre/components/nsPrompter.js:370:5|ModalPrompter.prototype.openPr ompt@resource://gre/components/nsPrompter.js:553:9|ModalPrompter.prototype.nsIPro mpt_promptUsernameAndPassword@resource://gre/components/nsPrompter.js:747:9|ModalPrompter.prototype.prompt Auth@resource://gre/components/nsPrompter.js:846:18|Prompter.prototype.promptAuth @resource://gre/components/nsPrompter.js:108:16|LoginManagerPrompter.prototyp e.promptAuth@resource://gre/components/nsLoginManagerPrompter.js:597:12|LoginManagerPromp tFactory.prototype._doAsyncPrompt/runnable.run@resource://gre/components/nsLoginManagerPrompter.js:107:16|
- toString = function () /* use strict */ toString
console.error: youtubetmadblock:
Object
- message = Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIXPCComponents_Utils.import]
- fileName = undefined
- lineNumber = 3
- stack = @undefined:3:NaN|@resource://jid1-w4wg5njhx4ljzr-at-jetpack/main/firefox/firefox.js:3:20|@resource://jid1-w4wg5njhx4ljzr-at-jetpack/main/youtube.js:2:49|run@resource://gre/modules/commonjs/sdk/addon/runner.js:145:19|startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:86:7|Handler.prototype.process@resource://gre/modules/Promise-backend.js:867:23|this.PromiseWalker.walkerLoop@re source://gre/modules/Promise-backend.js:746:7|this.PromiseWalker.scheduleWalker Loop/<@resource://gre/modules/Promise-backend.js:688:37|openModalWindow@resource://gre/components/nsPrompter.js:370:5|ModalPrompter.prototype.openPr ompt@resource://gre/components/nsPrompter.js:553:9|ModalPrompter.prototype.nsIPro mpt_promptUsernameAndPassword@resource://gre/components/nsPrompter.js:747:9|ModalPrompter.prototype.prompt Auth@resource://gre/components/nsPrompter.js:846:18|Prompter.prototype.promptAuth @resource://gre/components/nsPrompter.js:108:16|LoginManagerPrompter.prototyp e.promptAuth@resource://gre/components/nsLoginManagerPrompter.js:597:12|LoginManagerPromp tFactory.prototype._doAsyncPrompt/runnable.run@resource://gre/components/nsLoginManagerPrompter.js:107:16|
- toString = function () /* use strict */ toString
console.error: adblockforyoutube:
Object
- message = Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIXPCComponents_Utils.import]
- fileName = undefined
- lineNumber = 18
- stack = @undefined:18:NaN|@resource://jid1-q4sg8pyhq8kghs-at-jetpack/lib/firefox/firefox.js:18:20|@resource://jid1-q4sg8pyhq8kghs-at-jetpack/lib/common.js:3:13|run@resource://gre/modules/commonjs/sdk/addon/runner.js:145:19|startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:86:7|Handler.prototype.process@resource://gre/modules/Promise-backend.js:867:23|this.PromiseWalker.walkerLoop@re source://gre/modules/Promise-backend.js:746:7|this.PromiseWalker.scheduleWalker Loop/<@resource://gre/modules/Promise-backend.js:688:37|openModalWindow@resource://gre/components/nsPrompter.js:370:5|ModalPrompter.prototype.openPr ompt@resource://gre/components/nsPrompter.js:553:9|ModalPrompter.prototype.nsIPro mpt_promptUsernameAndPassword@resource://gre/components/nsPrompter.js:747:9|ModalPrompter.prototype.prompt Auth@resource://gre/components/nsPrompter.js:846:18|Prompter.prototype.promptAuth @resource://gre/components/nsPrompter.js:108:16|LoginManagerPrompter.prototyp e.promptAuth@resource://gre/components/nsLoginManagerPrompter.js:597:12|LoginManagerPromp tFactory.prototype._doAsyncPrompt/runnable.run@resource://gre/components/nsLoginManagerPrompter.js:107:16|
- toString = function () /* use strict */ toString
console.error: adblockforyoutube:
Object
- message = Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIXPCComponents_Utils.import]
- fileName = undefined
- lineNumber = 18
- stack = @undefined:18:NaN|@resource://jid1-q4sg8pyhq8kghs-at-jetpack/lib/firefox/firefox.js:18:20|@resource://jid1-q4sg8pyhq8kghs-at-jetpack/lib/common.js:3:13|run@resource://gre/modules/commonjs/sdk/addon/runner.js:145:19|startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:86:7|Handler.prototype.process@resource://gre/modules/Promise-backend.js:867:23|this.PromiseWalker.walkerLoop@re source://gre/modules/Promise-backend.js:746:7|this.PromiseWalker.scheduleWalker Loop/<@resource://gre/modules/Promise-backend.js:688:37|openModalWindow@resource://gre/components/nsPrompter.js:370:5|ModalPrompter.prototype.openPr ompt@resource://gre/components/nsPrompter.js:553:9|ModalPrompter.prototype.nsIPro mpt_promptUsernameAndPassword@resource://gre/components/nsPrompter.js:747:9|ModalPrompter.prototype.prompt Auth@resource://gre/components/nsPrompter.js:846:18|Prompter.prototype.promptAuth @resource://gre/components/nsPrompter.js:108:16|LoginManagerPrompter.prototyp e.promptAuth@resource://gre/components/nsLoginManagerPrompter.js:597:12|LoginManagerPromp tFactory.prototype._doAsyncPrompt/runnable.run@resource://gre/components/nsLoginManagerPrompter.js:107:16|
- toString = function () /* use strict */ toString
mrityunjay@mrityunjay-A7GMX-K:~$



When I open firefox in ubuntu default through command prompt (firefox &) then it gives following error on command prompt.

(process:6582): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

How to get rid of Xmonad log out case and firefox error?