User Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20100101 Firefox/12.0 Build ID: 20120420145725 Steps to reproduce: Any graphics hungry website seems to slow up the entire system as FF seems to be hogging memory Actual results: Try this: 1. Open FB and browse to a profile that has photographs 2. Browse the photos by hitting the "right" key on the keyboard cyclically 3. System slows down to a crawl if the site has like 50+ photos 4. Task Manager shows abnormally high Memory usage. 5. Closing FF brings down the memory usage again Issue cannot be replicated using IE9 Restarting FF with add-ons disabled does not help Application Basics Name Firefox Version 12.0 User Agent Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20100101 Firefox/12.0 Profile Directory Show Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Crash Reports about:crashes Memory Use about:memory Extensions Name Version Enabled ID Roboform Toolbar for Firefox 7.7.0 true {22119944-ED35-4ab1-910B-E619EA06A115} Test Pilot 1.2.1 true testpilot@labs.mozilla.com User Agent Switcher 0.7.3 true {e968fc70-8f95-4ab9-9e79-304de2a71ee1} AVG Safe Search 12.0.0.1912 false {1E73965B-8B48-48be-9C8D-68B920ABC1C4} Important Modified Preferences Name Value accessibility.typeaheadfind.flashBar 0 browser.cache.disk.capacity 1048576 browser.cache.disk.smart_size.first_run false browser.cache.disk.smart_size_cached_value 645120 browser.places.smartBookmarksVersion 2 browser.startup.homepage about:home browser.startup.homepage_override.buildID 20120420145725 browser.startup.homepage_override.mstone rv:12.0 extensions.lastAppVersion 12.0 keyword.URL http://isearch.avg.com/search?cid=%7B766cf794-1efd-4f83-b37e-d2ca4980dbd7%7D&mid=fff10ddea6c047d1ab59d1570a29d776-3fbaad… network.cookie.prefsMigrated true network.http.max-connections-per-server 1024 network.http.max-persistent-connections-per-proxy 1024 network.http.max-persistent-connections-per-server 1024 network.http.pipelining.maxrequests 1024 places.database.lastMaintenance 1334657472 places.history.enabled false places.history.expiration.transient_current_max_pages 80477 places.history.expiration.transient_optimal_database_size 128762674 privacy.clearOnShutdown.offlineApps true privacy.clearOnShutdown.passwords true privacy.clearOnShutdown.siteSettings true privacy.donottrackheader.enabled true privacy.sanitize.migrateFx3Prefs true privacy.sanitize.sanitizeOnShutdown true privacy.sanitize.timeSpan 2 security.warn_viewing_mixed false Graphics Adapter Description ATI Radeon HD 3600 Series Vendor ID 0x1002 Device ID 0x9598 Adapter RAM 256 Adapter Drivers aticfx32 aticfx32 atiumdag atidxx32 atiumdva Driver Version 8.961.0.0 Driver Date 4-5-2012 Direct2D Enabled true DirectWrite Enabled true (6.1.7601.17789) ClearType Parameters ClearType parameters not found WebGL Renderer Google Inc. -- ANGLE (ATI Radeon HD 3600 Series) -- OpenGL ES 2.0 (ANGLE 1.0.0.963) GPU Accelerated Windows 1/1 Direct3D 10 AzureBackend direct2d ----------------------- Main Process Explicit Allocations 59.21 MB (100.0%) -- explicit ├──27.80 MB (46.95%) -- js │ ├──13.54 MB (22.86%) -- compartment([System Principal], 0x5a76000) │ │ ├───7.21 MB (12.17%) -- gc-heap │ │ │ ├──3.39 MB (05.72%) -- objects │ │ │ │ ├──2.31 MB (03.90%) ── non-function │ │ │ │ └──1.08 MB (01.82%) ── function │ │ │ ├──1.59 MB (02.68%) -- shapes │ │ │ │ ├──0.97 MB (01.63%) ── tree │ │ │ │ └──0.62 MB (01.05%) ++ (2 tiny) │ │ │ ├──1.26 MB (02.13%) ── strings │ │ │ ├──0.78 MB (01.32%) ── scripts │ │ │ └──0.19 MB (00.32%) ++ (3 tiny) │ │ ├───1.68 MB (02.84%) ── string-chars │ │ ├───1.48 MB (02.49%) ── script-data │ │ ├───0.99 MB (01.66%) ++ shapes-extra │ │ ├───0.88 MB (01.48%) ── analysis-temporary │ │ ├───0.67 MB (01.12%) ++ (4 tiny) │ │ └───0.65 MB (01.10%) ── object-slots │ ├───3.31 MB (05.58%) -- compartment(https://bugzilla.mozilla.org/) │ │ ├──1.72 MB (02.91%) ++ gc-heap │ │ ├──0.91 MB (01.54%) ++ (7 tiny) │ │ └──0.67 MB (01.14%) ── script-data │ ├───3.19 MB (05.38%) -- compartment([System Principal], file:///C:/Program%20Files/Siber%20Systems/AI%20RoboForm/Firefox/bootstrap.js, 0x66e5000) │ │ ├──1.88 MB (03.17%) -- gc-heap │ │ │ ├──0.78 MB (01.32%) ── strings │ │ │ ├──0.60 MB (01.02%) ++ objects │ │ │ └──0.49 MB (00.83%) ++ (4 tiny) │ │ └──1.31 MB (02.21%) ++ (9 tiny) │ ├───1.84 MB (03.11%) -- compartment(atoms) │ │ ├──1.10 MB (01.85%) ── string-chars │ │ └──0.75 MB (01.26%) -- gc-heap │ │ ├──0.74 MB (01.24%) ── strings │ │ └──0.01 MB (00.02%) ++ arena │ ├───1.42 MB (02.40%) ++ (19 tiny) │ ├───1.28 MB (02.16%) ++ runtime │ ├───1.20 MB (02.03%) ── gc-heap-decommitted │ ├───1.03 MB (01.73%) ── xpconnect │ └───1.00 MB (01.69%) ── gc-heap-chunk-clean-unused ├──17.31 MB (29.24%) ── heap-unclassified ├───5.91 MB (09.98%) -- storage │ ├──4.60 MB (07.77%) -- sqlite │ │ ├──2.16 MB (03.64%) ++ (10 tiny) │ │ ├──1.26 MB (02.13%) -- places.sqlite │ │ │ ├──1.10 MB (01.86%) ── cache-used [3] │ │ │ └──0.16 MB (00.27%) ++ (2 tiny) │ │ └──1.18 MB (01.99%) ── other │ └──1.31 MB (02.21%) -- prefixset │ └──1.31 MB (02.21%) ── all ├───2.21 MB (03.73%) ── spell-check ├───2.07 MB (03.50%) -- layout │ ├──1.41 MB (02.37%) ++ (7 tiny) │ └──0.67 MB (01.13%) ++ shell(chrome://browser/content/browser.xul) ├───0.91 MB (01.53%) ── xpti-working-set ├───0.90 MB (01.52%) -- startup-cache │ ├──0.90 MB (01.52%) ── mapping │ └──0.00 MB (00.00%) ── data ├───0.84 MB (01.41%) ++ (4 tiny) ├───0.64 MB (01.08%) ── network-memory-cache └───0.63 MB (01.06%) -- dom └──0.63 MB (01.06%) ++ window-objects Other Measurements 0.00 MB ── canvas-2d-pixel-bytes 59.22 MB ── explicit 0.36 MB ── gfx-d2d-surfacecache 13.72 MB ── gfx-d2d-surfacevram 0.41 MB ── gfx-surface-image 0.00 MB ── gfx-surface-win32 42.00 MB ── heap-allocated 45.94 MB ── heap-committed 8.54% ── heap-committed-fragmentation 2.47 MB ── heap-dirty 8.00 MB ── heap-unallocated 19 ── js-compartments-system 2 ── js-compartments-user 15.00 MB ── js-gc-heap 1.26 MB ── js-gc-heap-arena-unused 1.00 MB ── js-gc-heap-chunk-clean-unused 0.14 MB ── js-gc-heap-chunk-dirty-unused 1.20 MB ── js-gc-heap-decommitted 2.15% ── js-gc-heap-unused-fraction 1.29 MB ── js-total-analysis-temporary 1.06 MB ── js-total-mjit 5.71 MB ── js-total-objects 3.66 MB ── js-total-scripts 3.60 MB ── js-total-shapes 5.79 MB ── js-total-strings 0.28 MB ── js-total-type-inference 0 ── low-memory-events-physical 0 ── low-memory-events-virtual 165.24 MB ── private 185.73 MB ── resident 4.60 MB ── storage-sqlite 499.01 MB ── vsize Expected results: Memory usage should have been on par with IE9 or thereabouts

This is with the issue hit: ---------------------------- Main Process Explicit Allocations 1,023.90 MB (100.0%) -- explicit ├────912.12 MB (89.08%) -- images │ ├──911.73 MB (89.05%) -- content │ │ ├──911.73 MB (89.05%) -- used │ │ │ ├──886.32 MB (86.56%) ── uncompressed-heap │ │ │ ├───25.41 MB (02.48%) ── raw │ │ │ └────0.00 MB (00.00%) ── uncompressed-nonheap │ │ └────0.00 MB (00.00%) ++ unused │ └────0.39 MB (00.04%) ++ chrome ├─────39.82 MB (03.89%) -- js │ ├──29.57 MB (02.89%) ++ (28 tiny) │ └──10.25 MB (01.00%) ++ compartment(https://www.facebook.com/) ├─────30.16 MB (02.95%) ── heap-unclassified ├─────23.82 MB (02.33%) ── network-memory-cache └─────17.97 MB (01.76%) ++ (9 tiny) Other Measurements 0.00 MB ── canvas-2d-pixel-bytes 1,023.90 MB ── explicit 559.95 MB ── gfx-d2d-surfacecache 11.12 MB ── gfx-d2d-surfacevram 886.72 MB ── gfx-surface-image 0.00 MB ── gfx-surface-win32 998.37 MB ── heap-allocated 1,004.39 MB ── heap-committed 0.59% ── heap-committed-fragmentation 1.20 MB ── heap-dirty 31.62 MB ── heap-unallocated 19 ── js-compartments-system 6 ── js-compartments-user 23.00 MB ── js-gc-heap 4.60 MB ── js-gc-heap-arena-unused 0.00 MB ── js-gc-heap-chunk-clean-unused 0.00 MB ── js-gc-heap-chunk-dirty-unused 6.46 MB ── js-gc-heap-decommitted 0.04% ── js-gc-heap-unused-fraction 2.15 MB ── js-total-analysis-temporary 1.38 MB ── js-total-mjit 6.24 MB ── js-total-objects 6.07 MB ── js-total-scripts 5.62 MB ── js-total-shapes 3.11 MB ── js-total-strings 1.11 MB ── js-total-type-inference 0 ── low-memory-events-physical 0 ── low-memory-events-virtual 1,138.21 MB ── private 1,164.39 MB ── resident 5.29 MB ── storage-sqlite 1,500.69 MB ── vsize

This is after logging out of FB -------------------------------- Main Process Explicit Allocations 134.88 MB (100.0%) -- explicit ├───38.39 MB (28.46%) -- js │ ├───9.77 MB (07.24%) -- compartment(https://www.facebook.com/) │ │ ├──5.77 MB (04.28%) -- gc-heap │ │ │ ├──2.18 MB (01.62%) -- arena │ │ │ │ ├──2.13 MB (01.58%) ── unused │ │ │ │ └──0.05 MB (00.04%) ++ (2 tiny) │ │ │ ├──1.98 MB (01.47%) ++ (4 tiny) │ │ │ └──1.61 MB (01.19%) ++ objects │ │ └──4.00 MB (02.96%) ++ (8 tiny) │ ├───8.83 MB (06.55%) -- compartment([System Principal], 0x5a76000) │ │ ├──5.09 MB (03.77%) -- gc-heap │ │ │ ├──1.89 MB (01.40%) ++ (5 tiny) │ │ │ ├──1.63 MB (01.21%) ++ objects │ │ │ └──1.57 MB (01.17%) ++ shapes │ │ ├──2.23 MB (01.66%) ++ (8 tiny) │ │ └──1.51 MB (01.12%) ── script-data │ ├───5.40 MB (04.01%) -- compartment(https://bugzilla.mozilla.org/) │ │ ├──3.07 MB (02.27%) ++ gc-heap │ │ └──2.34 MB (01.73%) ++ (8 tiny) │ ├───4.39 MB (03.26%) ── gc-heap-decommitted │ ├───4.09 MB (03.03%) ++ (23 tiny) │ ├───3.52 MB (02.61%) -- compartment([System Principal], file:///C:/Program%20Files/Siber%20Systems/AI%20RoboForm/Firefox/bootstrap.js, 0x66e5000) │ │ ├──2.20 MB (01.63%) ++ gc-heap │ │ └──1.32 MB (00.97%) ++ (9 tiny) │ └───2.38 MB (01.76%) ++ compartment(atoms) ├───28.02 MB (20.77%) ── heap-unclassified ├───25.84 MB (19.16%) -- images │ ├──25.45 MB (18.87%) -- content │ │ ├──25.45 MB (18.87%) -- used │ │ │ ├──25.41 MB (18.84%) ── raw │ │ │ └───0.04 MB (00.03%) ++ (2 tiny) │ │ └───0.00 MB (00.00%) ++ unused │ └───0.39 MB (00.29%) ++ chrome ├───24.00 MB (17.79%) ── network-memory-cache ├────6.60 MB (04.89%) -- storage │ ├──5.29 MB (03.92%) -- sqlite │ │ ├──3.56 MB (02.64%) ++ (11 tiny) │ │ └──1.73 MB (01.28%) -- places.sqlite │ │ ├──1.48 MB (01.10%) ── cache-used [3] │ │ └──0.25 MB (00.19%) ++ (2 tiny) │ └──1.31 MB (00.97%) ++ prefixset ├────4.99 MB (03.70%) -- layout │ ├──1.89 MB (01.40%) ++ (11 tiny) │ ├──1.69 MB (01.25%) ++ shell(https://bugzilla.mozilla.org/show_bug.cgi?id=761147) │ └──1.41 MB (01.05%) ++ shell(https://www.facebook.com/photo.php?fbid=4063683278359&set=a.4063596716195.2173581.1470563921&type=1&theater) ├────2.43 MB (01.80%) -- dom │ └──2.43 MB (01.80%) -- window-objects │ ├──1.65 MB (01.22%) ++ active │ └──0.78 MB (00.58%) ++ (2 tiny) ├────2.41 MB (01.79%) ++ (5 tiny) └────2.21 MB (01.64%) ── spell-check Other Measurements 0.00 MB ── canvas-2d-pixel-bytes 134.89 MB ── explicit 0.38 MB ── gfx-d2d-surfacecache 11.11 MB ── gfx-d2d-surfacevram 0.44 MB ── gfx-surface-image 0.00 MB ── gfx-surface-win32 109.36 MB ── heap-allocated 118.98 MB ── heap-committed 8.07% ── heap-committed-fragmentation 1.91 MB ── heap-dirty 26.64 MB ── heap-unallocated 19 ── js-compartments-system 4 ── js-compartments-user 23.00 MB ── js-gc-heap 4.96 MB ── js-gc-heap-arena-unused 0.00 MB ── js-gc-heap-chunk-clean-unused 0.11 MB ── js-gc-heap-chunk-dirty-unused 4.39 MB ── js-gc-heap-decommitted 0.17% ── js-gc-heap-unused-fraction 0.89 MB ── js-total-analysis-temporary 1.29 MB ── js-total-mjit 6.46 MB ── js-total-objects 6.18 MB ── js-total-scripts 5.65 MB ── js-total-shapes 4.23 MB ── js-total-strings 0.99 MB ── js-total-type-inference 0 ── low-memory-events-physical 0 ── low-memory-events-virtual 250.91 MB ── private 278.52 MB ── resident 5.29 MB ── storage-sqlite 599.31 MB ── vsize

This is a good minute after FB closed ------------------------------------- Main Process Explicit Allocations 105.37 MB (100.0%) -- explicit ├───41.94 MB (39.80%) -- js │ ├───9.50 MB (09.01%) ── gc-heap-chunk-dirty-unused │ ├───8.62 MB (08.18%) -- compartment([System Principal], 0x5a76000) │ │ ├──4.93 MB (04.68%) -- gc-heap │ │ │ ├──1.89 MB (01.79%) ++ (5 tiny) │ │ │ ├──1.53 MB (01.45%) ++ objects │ │ │ └──1.51 MB (01.43%) ++ shapes │ │ ├──1.51 MB (01.44%) ── script-data │ │ ├──1.12 MB (01.06%) ++ (7 tiny) │ │ └──1.05 MB (01.00%) ++ shapes-extra │ ├───5.65 MB (05.36%) -- compartment(https://bugzilla.mozilla.org/) │ │ ├──3.00 MB (02.84%) ++ gc-heap │ │ ├──1.45 MB (01.38%) ++ (7 tiny) │ │ └──1.20 MB (01.14%) ── script-data │ ├───5.00 MB (04.74%) ── gc-heap-chunk-clean-unused │ ├───4.44 MB (04.21%) ── gc-heap-decommitted │ ├───3.23 MB (03.07%) -- compartment([System Principal], file:///C:/Program%20Files/Siber%20Systems/AI%20RoboForm/Firefox/bootstrap.js, 0x66e5000) │ │ ├──1.93 MB (01.83%) ++ gc-heap │ │ └──1.31 MB (01.24%) ++ (9 tiny) │ ├───1.83 MB (01.74%) ++ compartment(atoms) │ ├───1.47 MB (01.40%) ++ (18 tiny) │ ├───1.13 MB (01.08%) ++ runtime │ └───1.07 MB (01.01%) ── xpconnect ├───24.13 MB (22.90%) ── network-memory-cache ├───23.12 MB (21.94%) ── heap-unclassified ├────6.60 MB (06.26%) -- storage │ ├──5.29 MB (05.02%) -- sqlite │ │ ├──2.30 MB (02.18%) ++ (10 tiny) │ │ ├──1.73 MB (01.64%) -- places.sqlite │ │ │ ├──1.48 MB (01.40%) ── cache-used [3] │ │ │ └──0.25 MB (00.24%) ++ (2 tiny) │ │ └──1.27 MB (01.20%) ── other │ └──1.31 MB (01.24%) -- prefixset │ └──1.31 MB (01.24%) ── all ├────3.22 MB (03.06%) -- layout │ ├──1.78 MB (01.69%) -- shell(https://bugzilla.mozilla.org/show_bug.cgi?id=761147) │ │ ├──1.43 MB (01.35%) ── arenas [3] │ │ └──0.36 MB (00.34%) ++ (2 tiny) │ └──1.44 MB (01.37%) ++ (5 tiny) ├────2.77 MB (02.63%) ++ (6 tiny) ├────2.21 MB (02.10%) ── spell-check └────1.38 MB (01.31%) -- dom └──1.38 MB (01.31%) ++ window-objects Other Measurements 0.10 MB ── canvas-2d-pixel-bytes 105.38 MB ── explicit 0.37 MB ── gfx-d2d-surfacecache 11.21 MB ── gfx-d2d-surfacevram 0.43 MB ── gfx-surface-image 0.00 MB ── gfx-surface-win32 72.16 MB ── heap-allocated 84.86 MB ── heap-committed 14.95% ── heap-committed-fragmentation 1.86 MB ── heap-dirty 63.83 MB ── heap-unallocated 19 ── js-compartments-system 2 ── js-compartments-user 31.00 MB ── js-gc-heap 2.47 MB ── js-gc-heap-arena-unused 5.00 MB ── js-gc-heap-chunk-clean-unused 9.50 MB ── js-gc-heap-chunk-dirty-unused 4.44 MB ── js-gc-heap-decommitted 0.35% ── js-gc-heap-unused-fraction 0.59 MB ── js-total-analysis-temporary 0.98 MB ── js-total-mjit 4.03 MB ── js-total-objects 4.43 MB ── js-total-scripts 4.12 MB ── js-total-shapes 3.04 MB ── js-total-strings 0.46 MB ── js-total-type-inference 0 ── low-memory-events-physical 0 ── low-memory-events-virtual 224.13 MB ── private 254.21 MB ── resident 5.29 MB ── storage-sqlite 626.26 MB ── vsize