User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Firefox/68.0

Steps to reproduce:

My work involves a lot of Tabs to open. But lately 70%of my total 8GB RAM in Mac OS is always in use and heats up the laptop slows it down.

Actual results:

Laptot Heating from all places.
As a result Fan running constantly and slowing the laptop down

Expected results:

Shouldn't take this much Memory

Application Basics

Name: Firefox
Version: 68.8.0esr
Build ID: 20200429190206
Update Channel: esr
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Firefox/68.0
OS: Darwin 18.7.0
Multiprocess Windows: 1/1 Enabled by default
Remote Processes: 9
Enterprise Policies: Active
Google Location Service Key: Found
Google Safebrowsing Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days

Firefox Features

Name: Firefox Monitor
Version: 3.0
ID: fxmonitor@mozilla.org

Name: Firefox Screenshots
Version: 39.0.0
ID: screenshots@mozilla.org

Name: Form Autofill
Version: 1.0
ID: formautofill@mozilla.org

Name: Web Compat
Version: 10.1.2
ID: webcompat@mozilla.org

Name: WebCompat Reporter
Version: 1.1.0
ID: webcompat-reporter@mozilla.org

Remote Processes

Type: Web Content
Count: 8 / 8

Type: Extension
Count: 1

Extensions

Name: Amazon Enterprise Access
Version: 1.4.0
Enabled: true
ID: amazon_enterprise_access@amazon

Name: Amazon.com
Version: 1.1
Enabled: true
ID: amazondotcom@search.mozilla.org

Name: Bing
Version: 1.0
Enabled: true
ID: bing@search.mozilla.org

Name: DuckDuckGo
Version: 1.0
Enabled: true
ID: ddg@search.mozilla.org

Name: eBay
Version: 1.0
Enabled: true
ID: ebay@search.mozilla.org

Name: Google
Version: 1.0
Enabled: true
ID: google@search.mozilla.org

Name: Tampermonkey
Version: 4.11.6114
Enabled: true
ID: firefox@tampermonkey.net

Name: Tree Style Tab
Version: 3.5.5
Enabled: true
ID: treestyletab@piro.sakura.ne.jp

Name: Twitter
Version: 1.0
Enabled: true
ID: twitter@search.mozilla.org

Name: Wikipedia (en)
Version: 1.0
Enabled: true
ID: wikipedia@search.mozilla.org

Graphics

Features
Compositing: OpenGL
Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled
WebGL 1 Driver WSI Info: CGL
WebGL 1 Driver Renderer: Intel Inc. -- Intel(R) Iris(TM) Plus Graphics 640
WebGL 1 Driver Version: 4.1 INTEL-12.10.16
WebGL 1 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_disjoint_timer_query EXT_float_blend EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_compression_rgtc EXT_texture_filter_anisotropic OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context
WebGL 2 Driver WSI Info: CGL
WebGL 2 Driver Renderer: Intel Inc. -- Intel(R) Iris(TM) Plus Graphics 640
WebGL 2 Driver Version: 4.1 INTEL-12.10.16
WebGL 2 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier
WebGL 2 Extensions: EXT_color_buffer_float EXT_disjoint_timer_query EXT_float_blend EXT_texture_compression_rgtc EXT_texture_filter_anisotropic OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context
Uses Tiling: true
Uses Tiling (Content): true
Off Main Thread Painting Enabled: true
Off Main Thread Painting Worker Count: 3
Target Frame Rate: 60
GPU #1
Active: Yes
Vendor ID: 0x8086
Device ID: 0x5926

Diagnostics
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
TileHeight: 1024
TileWidth: 1024
Decision Log
WEBRENDER:
opt-in by default: WebRender is an opt-in feature
WEBRENDER_QUALIFIED:
blacklisted by env: No qualified hardware

Media

Audio Backend: audiounit
Max Channels: 2
Preferred Sample Rate: 44100
Output Devices
Name: Group
Internal Speakers: AppleHDAEngineOutput:1F,3,0,1,1:0
Input Devices
Name: Group
Internal Microphone: AppleHDAEngineInput:1F,3,0,1,0:1

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.amount_written: 1718311
browser.cache.disk.capacity: 1048576
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.telemetry_report_ID: 10
browser.search.useDBForOrder: true
browser.sessionstore.upgradeBackup.latestBuildID: 20200429190206
browser.sessionstore.warnOnQuit: true
browser.startup.homepage: about:home
browser.startup.homepage_override.buildID: 20200429190206
browser.startup.homepage_override.mstone: 68.8.0
browser.urlbar.placeholderName: Google
extensions.lastAppVersion: 68.8.0
font.internaluseonly.changed: false
idle.lastDailyNotification: 1593160306
media.gmp-gmpopenh264.abi: x86_64-gcc3
media.gmp-gmpopenh264.lastUpdate: 1583127670
media.gmp-gmpopenh264.version: 1.8.1.1
media.gmp-manager.buildID: 20200429190206
media.gmp-manager.lastCheck: 1592791454
media.gmp-widevinecdm.abi: x86_64-gcc3
media.gmp-widevinecdm.lastUpdate: 1586934991
media.gmp-widevinecdm.version: 4.10.1582.2
media.gmp.storage.version.observed: 1
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1592791980
places.history.expiration.transient_current_max_pages: 88963
plugin.disable_full_page_plugin_for_types: application/pdf
privacy.sanitize.pending: [{"id":"newtab-container","itemsToClear":[],"options":{}}]
privacy.userContext.enabled: true
privacy.userContext.extension: treestyletab@piro.sakura.ne.jp
privacy.userContext.longPressBehavior: 2
privacy.userContext.ui.enabled: true
security.sandbox.content.tempDirSuffix: ac238c56-59fc-b840-aa55-9896f73f241c
security.sandbox.plugin.tempDirSuffix: 8e95bcc3-2483-e943-82ba-94c847ed1c6a
services.sync.declinedEngines:
signon.importedFromSqlite: true
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1591269107

Important Locked Preferences

network.automatic-ntlm-auth.trusted-uris: https://datamigration.corp.amazon.com, https://datamigrationforoncall.corp.amazon.com
network.negotiate-auth.delegation-uris: https://.amazon.com, https://amazon.awsapps.com
network.negotiate-auth.trusted-uris: https://.amazon.com, https://amazon.awsapps.com
network.trr.mode: 5
security.enterprise_roots.enabled: true
security.tls.version.min: 1

Places Database

JavaScript

Incremental GC: true

Accessibility

Activated: false
Prevent Accessibility: 0

Library Versions

NSPR
Expected minimum version: 4.21
Version in use: 4.21

NSS
Expected minimum version: 3.44.3
Version in use: 3.44.3

NSSSMIME
Expected minimum version: 3.44.3
Version in use: 3.44.3

NSSSSL
Expected minimum version: 3.44.3
Version in use: 3.44.3

NSSUTIL
Expected minimum version: 3.44.3
Version in use: 3.44.3

Sandbox

Content Process Sandbox Level: 3
Effective Content Process Sandbox Level: 3

Internationalization & Localization

Application Settings
Requested Locales: ["en-US"]
Available Locales: ["en-US"]
App Locales: ["en-US"]
Regional Preferences: ["en-IN"]
Default Locale: "en-US"
Operating System
System Locales: ["en-IN"]
Regional Preferences: ["en-IN"]

The severity field is not set for this bug.
:glandium, could you have a look please?

For more information, please visit auto_nag documentation.

We are working on Firefox tab unloading (bug 1587762) to improve these low memory situations.

68.8.0esr

Was that with a hard disk drive, solid state, or solid state hybrid?

https://blog.mozilla.org/performance/

How are things now, with the most recent release (or ESR)?

Hello All

I dont remember, but most probably it was SSD.

Also, FYI, it was a work laptop, so I must have used it for a probably a couple more months after I raised this bug, and never again.

Honestly, you can close this bug and mark it complete as it doesn't concern me anymore. But feel free to leave it open for your internal tracking purpose. Thanks for the work you guys are putting in even after 3 years. Appreciate it.

Thanks
Anshuman

Please open a new bug if you have an issue with Firefox in the future.