CPU usage 100% after file download with Karma Blocker

RESOLVED INVALID

Status

()

Firefox
Extension Compatibility
RESOLVED INVALID
2 years ago
6 months ago

People

(Reporter: cattledogit, Unassigned)

Tracking

48 Branch
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

(Reporter)

Description

2 years ago
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0
Build ID: 20160623154057

Steps to reproduce:

continuous use


Actual results:

After running FF for a while with multiple taps open, typically with memory usage >1GB, downloading a file such as a pdf will lead to 100% CPU usage on one core and FF "Not Responding." The only resolution is to kill and restart FF, which I now do 2-4 times/day.

This problem only started with the most recent version of FF. I have many, but removing or disabling recently installed ones didn't help.


Expected results:

Download should have completed
ello

Can you reproduce the issue in Safe Mode[1]?
If yes and you can reproduce the issue in Safe Mode,
can you still reproduce it even with clean new fresh profile without any addons (extensions and plugins)[2]?

You can also try a standard troubleshoot and diagnose procedure[3].



[1] = https://support.mozilla.org/kb/troubleshoot-firefox-issues-using-safe-mode
[2] = https://support.mozilla.org/kb/refresh-firefox-reset-add-ons-and-settings
[3] = https://support.mozilla.org/kb/troubleshoot-and-diagnose-firefox-problems
Flags: needinfo?(kjscreen-mbugz)
(Reporter)

Comment 2

2 years ago
The problem is that the issue doesn't typically show up until after browsing for a couple of hours, which I'm not comfortable doing without the privacy protection of addons, and in any case it would be time-consuming.

Are there any tracing or load testing tools that would make tracking this down easier?

One thing I could do fairly easily is go back to an earlier version of FF and see if the problem disappears. Would that prove anything?
Cattledogit, 

Could you please type about:support in the URL bar, click on the "Copy text to clipboard" button and paste the input into a new Comment of this bug?

The reason why you were asked to try to reproduce in safe mode is because one your add-ons or plug-ins or modified preferences might be the reason for your usage.

Also, check this link with useful troubleshooting methods and let us know the results:
https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix
(Reporter)

Comment 4

2 years ago
Thanks for your reply.

I deleted content-prefs.sqlite and will see if that helps. The checkbox for sharing telemetry was already checked. Here's the about:support data, with a couple of obfuscations:

Application Basics
------------------

Name: Firefox
Version: 47.0.1
Build ID: 20160623154057
Update Channel: release
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0
OS: Windows_NT 10.0 x86
Multiprocess Windows: 0/2 (Disabled)
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports

Extensions
----------

Name: Adblock Plus
Version: 2.7.3
Enabled: true
ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

Name: Add to Search Bar
Version: 2.9
Enabled: true
ID: add-to-searchbox@maltekraus.de

Name: Add-on Compatibility Reporter
Version: 2.0.6.1-signed.1-signed
Enabled: true
ID: compatibility@addons.mozilla.org

Name: Autofill Forms
Version: 1.1.4
Enabled: true
ID: autofillForms@blueimp.net

Name: Avast Online Security
Version: 10.3.3.44
Enabled: true
ID: wrc@avast.com

Name: Avast SafePrice
Version: 10.3.5.39
Enabled: true
ID: sp@avast.com

Name: BetterPrivacy
Version: 1.74
Enabled: true
ID: {d40f5e7b-d2cf-4856-b441-cc613eeffbe3}

Name: checkCompatibility
Version: 1.3.1-signed.1-signed
Enabled: true
ID: check-compatibility@dactyl.googlecode.com

Name: Classic Theme Restorer
Version: 1.5.4.2
Enabled: true
ID: ClassicThemeRestorer@ArisT2Noia4dev

Name: CLEO
Version: 6.2
Enabled: true
ID: CLEO@guid.customsoftwareconsult.com

Name: Cookie Controller
Version: 5.5
Enabled: true
ID: {ac2cfa60-bc96-11e0-962b-0800200c9a66}

Name: Cookies Manager+
Version: 1.12
Enabled: true
ID: {bb6bc1bb-f824-4702-90cd-35e2fb24f25d}

Name: Copy Urls Expert
Version: 2.5.0
Enabled: true
ID: copy-urls-expert@kashiif-gmail.com

Name: Distill Web Monitor
Version: 1.6.1
Enabled: true
ID: alertbox@ajitk.com

Name: Element Hiding Helper for Adblock Plus
Version: 1.3.8
Enabled: true
ID: elemhidehelper@adblockplus.org

Name: Export Cookies
Version: 1.2.1-signed.1-signed
Enabled: true
ID: exportcookies@aag

Name: FEBE
Version: 8.9.2
Enabled: true
ID: {4BBDD651-70CF-4821-84F8-2B918CF89CA3}

Name: Firefox Hello
Version: 1.4.2
Enabled: true
ID: loop@mozilla.org

Name: FireFTP
Version: 2.0.28
Enabled: true
ID: {a7c6cf7f-112c-4500-a7ea-39801a327e5f}

Name: FireShot
Version: 0.98.87
Enabled: true
ID: {0b457cAA-602d-484a-8fe7-c1d894a011ba}

Name: FlashDisable
Version: 1.1.1.1-signed.1-signed
Enabled: true
ID: jid0-bbA9VAawX3LMWDu668aUDrpQVXU@jetpack

Name: FoxClocks
Version: 4.2.3
Enabled: true
ID: {d37dc5d0-431d-44e5-8c91-49419370caa1}

Name: Garmin Communicator
Version: 4.1.0.1-signed.1-signed
Enabled: true
ID: {195A3098-0BD5-4e90-AE22-BA1C540AFD1E}

Name: Go Parent Folder
Version: 2.9.1.1-signed.1-signed
Enabled: true
ID: goParentFolder@alice

Name: Google search link fix
Version: 1.5.3
Enabled: true
ID: jid0-XWJxt5VvCXkKzQK99PhZqAn7Xbg@jetpack

Name: Greasemonkey
Version: 3.8
Enabled: true
ID: {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

Name: Image Zoom
Version: 0.6.3.1-signed.1-signed
Enabled: true
ID: {1A2D0EC4-75F5-4c91-89C4-3656F6E44B68}

Name: Karma Blocker
Version: 0.6.1
Enabled: true
ID: kabl@trac.arantius.com

Name: LeechBlock
Version: 1.0.3
Enabled: true
ID: {a95d8332-e4b4-6e7f-98ac-20b733364387}

Name: Mozilla Archive Format
Version: 4.0.1
Enabled: true
ID: {7f57cf46-4467-4c2d-adfa-0cba7c507e54}

Name: Multi-process staged rollout
Version: 1.0
Enabled: true
ID: e10srollout@mozilla.org

Name: Multifox
Version: 3.2.3
Enabled: true
ID: multifox@hultmann

Name: Pocket
Version: 1.0.2
Enabled: true
ID: firefox@getpocket.com

Name: Proxy Switcher
Version: 0.1.7
Enabled: true
ID: jid0-hjBdm7jJii7llLkqacvGnd3gHge@jetpack

Name: Redirector
Version: 3.0.6
Enabled: true
ID: redirector@einaregilsson.com

Name: RefControl
Version: 0.8.17.1-signed.1-signed
Enabled: true
ID: {455D905A-D37C-4643-A9E2-F6FEFAA0424A}

Name: S3.Google Translator
Version: 5.25
Enabled: true
ID: s3google@translator

Name: Saved Password Editor
Version: 2.9.6
Enabled: true
ID: savedpasswordeditor@daniel.dawson

Name: Screengrab (fix version)
Version: 0.99.04c
Enabled: true
ID: {02450914-cdd9-410f-b1da-db004e18c671}

Name: Self-Destructing Cookies
Version: 0.4.10
Enabled: true
ID: jid0-9XfBwUWnvPx4wWsfBWMCm4Jj69E@jetpack

Name: Session Manager
Version: 0.8.1.12
Enabled: true
ID: {1280606b-2510-4fe0-97ef-9b5a22eafe30}

Name: Shelve
Version: 1.40
Enabled: true
ID: shelve@thomas.link

Name: Show Parent Folder
Version: 2.1.1-signed.1-signed
Enabled: true
ID: showParentFolder@alice

Name: Sidebar Bookmarks Search Plus
Version: 2.0.1.1-signed.1-signed
Enabled: true
ID: sidebarBookmarksSearch@alice

Name: Tab Mix Plus
Version: 0.5.0.0
Enabled: true
ID: {dc572301-7619-498c-a57d-39143191b318}

Name: TinyURL Generator
Version: 2.6.1.1-signed.1-signed
Enabled: true
ID: tinyurl.addon@fast-chat.co.uk

Name: YouTube Caption Downloader
Version: 2.3.1-signed.1-signed
Enabled: true
ID: captiondownloader@hiephm.com

Name: Youtube MP3 Podcaster
Version: 3.9.0
Enabled: true
ID: youtubemp3podcaster@jeremy.d.gregorio.com

Name: Zoom Page
Version: 14.7
Enabled: true
ID: zoompage@DW-dev

Name: FiddlerHook
Version: 2.5.1.8
Enabled: false
ID: fiddlerhook@fiddler2.com

Name: Google Gears
Version: 0.5.36.0
Enabled: false
ID: {000a9d1c-beef-4f90-9363-039d445309b8}

Name: Pocket
Version: 3.0.6.1-signed
Enabled: false
ID: isreaditlater@ideashower.com

Name: RescueTime
Version: 3.0.224
Enabled: false
ID: rescuetime_firefox@rescuetime.com

Name: Skype
Version: 8.3.0.9150
Enabled: false
ID: {82AF8DCA-6DE9-405D-BD5E-43525BDAD38A}

Name: TooManyTabs
Version: 1.4.8
Enabled: false
ID: TooManyTabs@visibotech.com

Name: tor-flashproxy-badge
Version: 0.2.9
Enabled: false
ID: jid0-1kqApO5BUHwjBQft5BEUXHXZjCA@jetpack

Name: ZenMate Security, Privacy & Unblock VPN
Version: 5.5.3
Enabled: false
ID: firefox@zenmate.com

Graphics
--------

Adapter Description: Intel(R) HD Graphics 4000
Adapter Drivers: igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter RAM: Unknown
Asynchronous Pan/Zoom: none
Device ID: 0x0162
Direct2D Enabled: true
DirectWrite Enabled: true (10.0.10586.494)
Driver Date: 8-17-2015
Driver Version: 10.18.10.4276
GPU #2 Active: false
GPU Accelerated Windows: 2/2 Direct3D 11 (OMTC)
Subsys ID: 01621849
Supports Hardware H264 Decoding: Yes
Vendor ID: 0x8086
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 4000 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasAccelerated: 0
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo

Important Modified Preferences
------------------------------

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.parent_directory: C:\Users\xxxxx\AppData\Local\Mozilla\Firefox\Profiles\13awpkmv.xxxxx
browser.cache.disk.smart_size_cached_value: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 3
browser.download.folderList: 2
browser.download.importedFromSqlite: true
browser.download.manager.closeWhenDone: true
browser.download.manager.showAlertOnComplete: false
browser.download.manager.showWhenStarting: false
browser.download.useDownloadDir: false
browser.fixup.domainwhitelist.199.34.228.66: true
browser.history_expire_days.mirror: 90
browser.places.importBookmarksHTML: false
browser.places.importDefaults: false
browser.places.leftPaneFolderId: -1
browser.places.migratePostDataAnnotations: false
browser.places.smartBookmarksVersion: 7
browser.places.updateRecentTagsUri: false
browser.search.openintab: true
browser.search.param.yahoo-fr: chr-greentree_ff&type=642886&ilc=12
browser.search.suggest.enabled: false
browser.search.useDBForOrder: true
browser.sessionstore.max_tabs_undo: 15
browser.sessionstore.upgradeBackup.latestBuildID: 20160623154057
browser.startup.homepage: C:\home.html
browser.startup.homepage_override.buildID: 20160623154057
browser.startup.homepage_override.mstone: 47.0.1
browser.tabs.closeWindowWithLastTab: false
browser.tabs.onTop: false
browser.tabs.tabMinWidth: 75
browser.tabs.warnOnClose: false
dom.apps.reset-permissions: true
dom.max_chrome_script_run_time: 60
dom.max_script_run_time: 1800
dom.mozApps.used: true
dom.w3c_touch_events.expose: false
extensions.checkCompatibility.17.0: false
extensions.checkCompatibility.18.0: false
extensions.checkCompatibility.19.0: false
extensions.checkCompatibility.21.0: false
extensions.checkCompatibility.22.0: false
extensions.checkCompatibility.23.0: false
extensions.checkCompatibility.24.0: false
extensions.checkCompatibility.25.0: false
extensions.checkCompatibility.26.0: false
extensions.checkCompatibility.27.0: false
extensions.checkCompatibility.28.0: false
extensions.checkCompatibility.29.0: false
extensions.checkCompatibility.30.0: false
extensions.checkCompatibility.31.0: false
extensions.checkCompatibility.32.0: false
extensions.checkCompatibility.33.0: false
extensions.checkCompatibility.33.1: false
extensions.checkCompatibility.34.0: false
extensions.checkCompatibility.35.0: false
extensions.checkCompatibility.36.0: false
extensions.checkCompatibility.37.0: false
extensions.checkCompatibility.38.0: false
extensions.checkCompatibility.39.0: false
extensions.checkCompatibility.40.0: false
extensions.checkCompatibility.41.0: false
extensions.checkCompatibility.42.0: false
extensions.checkCompatibility.43.0: false
extensions.checkCompatibility.44.0: false
extensions.checkCompatibility.45.0: false
extensions.checkCompatibility.46.0: false
extensions.checkCompatibility.47.0: false
extensions.checkCompatibility.nightly: false
extensions.lastAppVersion: 47.0.1
font.default: sans-serif
font.internaluseonly.changed: true
font.name.sans-serif.x-western: MS Sans Serif
font.name.serif.x-western: Arial
font.size.fixed.x-western: 15
general.useragent.extra.betterprivacy:
gfx.crash-guard.d3d11layers.appVersion: 47.0.1
gfx.crash-guard.d3d11layers.deviceID: 0x0162
gfx.crash-guard.d3d11layers.driverVersion: 10.18.10.4276
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.glcontext.gfx.driver-init.direct3d11-angle: true
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle: true
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-d3d11: false
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-warp: false
gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-try-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
gfx.crash-guard.status.d3d9video: 2
gfx.crash-guard.status.glcontext: 2
gfx.direct3d.last_used_feature_level_idx: 0
gfx.direct3d.prefer_10_1: true
gfx.driver-init.appVersion: 42.0
gfx.driver-init.deviceID: 0x0162
gfx.driver-init.driverVersion: 10.18.10.4276
gfx.driver-init.feature-d2d: true
gfx.driver-init.feature-d3d11: true
gfx.driver-init.status: 2
image.animation_mode: once
keyword.URL: http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=
media.benchmark.vp9.fps: 218
media.benchmark.vp9.versioncheck: 1
media.gmp-eme-adobe.abi: x86-msvc-x64
media.gmp-eme-adobe.lastUpdate: 1461904625
media.gmp-eme-adobe.version: 17
media.gmp-gmpopenh264.abi: x86-msvc-x64
media.gmp-gmpopenh264.lastUpdate: 1453932730
media.gmp-gmpopenh264.version: 1.5.3
media.gmp-manager.buildID: 20160623154057
media.gmp-manager.lastCheck: 1469572931
media.gmp-widevinecdm.abi: x86-msvc-x64
media.gmp-widevinecdm.lastUpdate: 1465390381
media.gmp-widevinecdm.version: 1.4.8.866
media.gmp.storage.version.observed: 1
media.hardware-video-decoding.failed: false
media.peerconnection.enabled: false
media.webrtc.debug.aec_log_dir: C:\Users\xxxxx\AppData\Local\Temp
media.webrtc.debug.log_file: C:\Users\xxxxx\AppData\Local\Temp\WebRTC.log
media.youtube-ua.override.to: 43
network.auth.allow-subresource-auth: 2
network.cookie.blockFutureCookies: true
network.cookie.cookieBehavior: 1
network.cookie.lifetimePolicy: 2
network.cookie.prefsMigrated: true
network.http.max-connections-per-server: 16
network.http.pipelining: true
network.http.pipelining.maxrequests: 16
network.http.pipelining.ssl: true
network.http.proxy.pipelining: true
network.predictor.cleaned-up: true
network.security.ports.banned: 8118,8123,9050,9051
places.database.lastMaintenance: 1469382950
places.history.expiration.transient_current_max_pages: 104858
places.last_vacuum: 1308934953
plugin.disable_full_page_plugin_for_types: audio/x-mpeg,audio/mpeg,audio/mp4,video/mp4,application/vnd.fdf,application/vnd.adobe.xfdf,application/vnd.adobe.xdp+xml
plugin.expose_full_path: true
plugin.importedState: true
plugin.state.flash: 0
plugin.state.java: 0
plugin.state.npappdetector: 0
plugin.state.npdeployjava: 0
plugin.state.npgeplugin: 0
plugin.state.nppdf: 1
plugin.state.npractrl: 0
print.print_printer: OKI C5500n color laser
print.printer_CutePDF_Writer.print_bgcolor: false
print.printer_CutePDF_Writer.print_bgimages: false
print.printer_CutePDF_Writer.print_colorspace:
print.printer_CutePDF_Writer.print_command:
print.printer_CutePDF_Writer.print_downloadfonts: false
print.printer_CutePDF_Writer.print_duplex: 3670070
print.printer_CutePDF_Writer.print_edge_bottom: 0
print.printer_CutePDF_Writer.print_edge_left: 0
print.printer_CutePDF_Writer.print_edge_right: 0
print.printer_CutePDF_Writer.print_edge_top: 0
print.printer_CutePDF_Writer.print_evenpages: true
print.printer_CutePDF_Writer.print_footercenter:
print.printer_CutePDF_Writer.print_footerleft: &PT
print.printer_CutePDF_Writer.print_footerright: &D
print.printer_CutePDF_Writer.print_headercenter:
print.printer_CutePDF_Writer.print_headerleft:
print.printer_CutePDF_Writer.print_headerright: &U
print.printer_CutePDF_Writer.print_in_color: true
print.printer_CutePDF_Writer.print_margin_bottom: 0.5
print.printer_CutePDF_Writer.print_margin_left: 0.5
print.printer_CutePDF_Writer.print_margin_right: 0.5
print.printer_CutePDF_Writer.print_margin_top: 0.5
print.printer_CutePDF_Writer.print_oddpages: true
print.printer_CutePDF_Writer.print_orientation: 0
print.printer_CutePDF_Writer.print_page_delay: 50
print.printer_CutePDF_Writer.print_pagedelay: 500
print.printer_CutePDF_Writer.print_paper_data: 1
print.printer_CutePDF_Writer.print_paper_height: -1.00
print.printer_CutePDF_Writer.print_paper_name:
print.printer_CutePDF_Writer.print_paper_size: 1881550905
print.printer_CutePDF_Writer.print_paper_size_type: 0
print.printer_CutePDF_Writer.print_paper_size_unit: 1
print.printer_CutePDF_Writer.print_paper_width: -1.00
print.printer_CutePDF_Writer.print_plex_name:
print.printer_CutePDF_Writer.print_printer: CutePDF Writer
print.printer_CutePDF_Writer.print_resolution: 600
print.printer_CutePDF_Writer.print_resolution_name:
print.printer_CutePDF_Writer.print_reversed: false
print.printer_CutePDF_Writer.print_scaling: 0.75
print.printer_CutePDF_Writer.print_shrink_to_fit: true
print.printer_CutePDF_Writer.print_to_file: false
print.printer_CutePDF_Writer.print_unwriteable_margin_bottom: 0
print.printer_CutePDF_Writer.print_unwriteable_margin_left: 0
print.printer_CutePDF_Writer.print_unwriteable_margin_right: 0
print.printer_CutePDF_Writer.print_unwriteable_margin_top: 0
print.printer_OKI_C5500n_color_laser.print_bgcolor: false
print.printer_OKI_C5500n_color_laser.print_bgimages: false
print.printer_OKI_C5500n_color_laser.print_colorspace:
print.printer_OKI_C5500n_color_laser.print_command:
print.printer_OKI_C5500n_color_laser.print_downloadfonts: false
print.printer_OKI_C5500n_color_laser.print_duplex: 3670070
print.printer_OKI_C5500n_color_laser.print_edge_bottom: 0
print.printer_OKI_C5500n_color_laser.print_edge_left: 0
print.printer_OKI_C5500n_color_laser.print_edge_right: 0
print.printer_OKI_C5500n_color_laser.print_edge_top: 0
print.printer_OKI_C5500n_color_laser.print_evenpages: true
print.printer_OKI_C5500n_color_laser.print_footercenter:
print.printer_OKI_C5500n_color_laser.print_footerleft: &PT
print.printer_OKI_C5500n_color_laser.print_footerright: &D
print.printer_OKI_C5500n_color_laser.print_headercenter:
print.printer_OKI_C5500n_color_laser.print_headerleft:
print.printer_OKI_C5500n_color_laser.print_headerright: &U
print.printer_OKI_C5500n_color_laser.print_in_color: true
print.printer_OKI_C5500n_color_laser.print_margin_bottom: 0.5
print.printer_OKI_C5500n_color_laser.print_margin_left: 0.5
print.printer_OKI_C5500n_color_laser.print_margin_right: 0.5
print.printer_OKI_C5500n_color_laser.print_margin_top: 0.5
print.printer_OKI_C5500n_color_laser.print_oddpages: true
print.printer_OKI_C5500n_color_laser.print_orientation: 0
print.printer_OKI_C5500n_color_laser.print_page_delay: 50
print.printer_OKI_C5500n_color_laser.print_pagedelay: 500
print.printer_OKI_C5500n_color_laser.print_paper_data: 1
print.printer_OKI_C5500n_color_laser.print_paper_height: -1.00
print.printer_OKI_C5500n_color_laser.print_paper_name:
print.printer_OKI_C5500n_color_laser.print_paper_size_type: 0
print.printer_OKI_C5500n_color_laser.print_paper_size_unit: 1
print.printer_OKI_C5500n_color_laser.print_paper_width: -1.00
print.printer_OKI_C5500n_color_laser.print_plex_name:
print.printer_OKI_C5500n_color_laser.print_resolution: 600
print.printer_OKI_C5500n_color_laser.print_resolution_name:
print.printer_OKI_C5500n_color_laser.print_reversed: false
print.printer_OKI_C5500n_color_laser.print_scaling: 0.75
print.printer_OKI_C5500n_color_laser.print_shrink_to_fit: true
print.printer_OKI_C5500n_color_laser.print_to_file: false
print.printer_OKI_C5500n_color_laser.print_unwriteable_margin_bottom: 0
print.printer_OKI_C5500n_color_laser.print_unwriteable_margin_left: 0
print.printer_OKI_C5500n_color_laser.print_unwriteable_margin_right: 0
print.printer_OKI_C5500n_color_laser.print_unwriteable_margin_top: 0
print.printer_OKI_C5500n.print_bgcolor: false
print.printer_OKI_C5500n.print_bgimages: false
print.printer_OKI_C5500n.print_colorspace:
print.printer_OKI_C5500n.print_command:
print.printer_OKI_C5500n.print_downloadfonts: false
print.printer_OKI_C5500n.print_duplex: 3670070
print.printer_OKI_C5500n.print_edge_bottom: 0
print.printer_OKI_C5500n.print_edge_left: 0
print.printer_OKI_C5500n.print_edge_right: 0
print.printer_OKI_C5500n.print_edge_top: 0
print.printer_OKI_C5500n.print_evenpages: true
print.printer_OKI_C5500n.print_footercenter:
print.printer_OKI_C5500n.print_footerleft: &PT
print.printer_OKI_C5500n.print_footerright: &D
print.printer_OKI_C5500n.print_headercenter:
print.printer_OKI_C5500n.print_headerleft: &T
print.printer_OKI_C5500n.print_headerright: &U
print.printer_OKI_C5500n.print_in_color: true
print.printer_OKI_C5500n.print_margin_bottom: 0.5
print.printer_OKI_C5500n.print_margin_left: 0.5
print.printer_OKI_C5500n.print_margin_right: 0.5
print.printer_OKI_C5500n.print_margin_top: 0.5
print.printer_OKI_C5500n.print_oddpages: true
print.printer_OKI_C5500n.print_orientation: 0
print.printer_OKI_C5500n.print_page_delay: 50
print.printer_OKI_C5500n.print_paper_data: 1
print.printer_OKI_C5500n.print_paper_height: 11.00
print.printer_OKI_C5500n.print_paper_name:
print.printer_OKI_C5500n.print_paper_size_type: 0
print.printer_OKI_C5500n.print_paper_size_unit: 0
print.printer_OKI_C5500n.print_paper_width: 8.50
print.printer_OKI_C5500n.print_plex_name:
print.printer_OKI_C5500n.print_resolution: 3211308
print.printer_OKI_C5500n.print_resolution_name:
print.printer_OKI_C5500n.print_reversed: false
print.printer_OKI_C5500n.print_scaling: 1.00
print.printer_OKI_C5500n.print_shrink_to_fit: true
print.printer_OKI_C5500n.print_to_file: false
print.printer_OKI_C5500n.print_unwriteable_margin_bottom: 0
print.printer_OKI_C5500n.print_unwriteable_margin_left: 0
print.printer_OKI_C5500n.print_unwriteable_margin_right: 0
print.printer_OKI_C5500n.print_unwriteable_margin_top: 0
privacy.cpd.cookies: false
privacy.cpd.downloads: false
privacy.cpd.extensions-sessionmanager: false
privacy.cpd.extensions-tabmix: false
privacy.cpd.formdata: false
privacy.cpd.history: false
privacy.cpd.sessions: false
privacy.donottrackheader.enabled: true
privacy.donottrackheader.value: 1
privacy.sanitize.migrateClearSavedPwdsOnExit: true
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.timeSpan: 0
security.dialog_enable_delay: 0
security.disable_button.openCertManager: false
security.warn_viewing_mixed: false
services.sync.declinedEngines: adblockplus
services.sync.engine.adblockplus: false
services.sync.engine.greasemonkey: true
services.sync.engine.prefs.modified: false
services.sync.lastPing: 1469555316
services.sync.lastSync: Tue Jul 26 2016 21:47:23 GMT-0400 (Eastern Standard Time)
services.sync.numClients: 2
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1468773017
ui.osk.debug.keyboardDisplayReason: IKPOS: Touch screen not found.

Important Locked Preferences
----------------------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.12
Version in use: 4.12

NSS
Expected minimum version: 3.23 Basic ECC
Version in use: 3.23 Basic ECC

NSSSMIME
Expected minimum version: 3.23 Basic ECC
Version in use: 3.23 Basic ECC

NSSSSL
Expected minimum version: 3.23 Basic ECC
Version in use: 3.23 Basic ECC

NSSUTIL
Expected minimum version: 3.23
Version in use: 3.23

Experimental Features
---------------------
(In reply to cattledogit from comment #4)
> Thanks for your reply.
> 
> I deleted content-prefs.sqlite and will see if that helps. The checkbox for
> sharing telemetry was already checked. Here's the about:support data, with a
> couple of obfuscations:

Thanks for all the details. Please let us know if the CPU usage decreases after deleting the content-prefs.sqlite file.
Closing this as incomplete due to lack of additional information from the reporter.

Cattledogit, please feel free to reopen it if you still have the problem reproducible (on the latest release) and you can provide additional details that could help us reproduce or identify your issue.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → INCOMPLETE
(Reporter)

Comment 7

2 years ago
I eventually came across a page where the problem was repeatable, and submitted it as a bug of the Karma Blocker add-on at https://github.com/arantius/karma-blocker/issues/22. As I wrote there, I think the problem began with a recent FF version, likely 47 or 48. For general browsing (not the specific site in the bug report), the problem occurs less frequently with the 64-bit version of FF.
(Reporter)

Updated

2 years ago
Status: RESOLVED → UNCONFIRMED
Resolution: INCOMPLETE → ---
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160726073904

I could not reproduce the CPU usage increase on Firefox 48 having the karma blocker (0.6.1 version) installed. If my assumption is correct the reason for the CPU usage increase is running a combination of several add-ons + karma blocker - see Comment 4. 
For a better diagnose, moving this issue to Extensions Compatibility.
Component: Untriaged → Extension Compatibility

Comment 9

2 years ago
cattledogit, does the karma blocker issue only happen for you if some other addon is also enabled?
Summary: CPU usage 100% after file download → CPU usage 100% after file download with Karma Blocker
(Reporter)

Comment 10

2 years ago
The problem occurs for me with only Karma Blocker enabled, and all other addons disabled. It occurs with both 0.6.1 and 0.6.2beta2, no on FF 48.0.2.
Version: 47 Branch → 48 Branch
(Reporter)

Comment 11

2 years ago
> ...no on FF 48.0.2.
rather, now on FF 48.0.2.

Comment 12

6 months ago
With WebExtensions being the only valid way of doing extensions in Firefox 57, I don't think this bug is still relevant.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 2 years ago6 months ago
Resolution: --- → INVALID
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