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How do I stop my login.json file corrupting everytime I close Firefox?

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  • 2 have this problem
  • Last reply by UrpsychoEX

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I'm currently deployed and using a VPN over the Sapphire Wifi network. My Laptop is over five years old and will be replaced within two months. However when I close Firefox the login.json file corrupts everytime. I don't really know what to do anymore. I've copied the file and the key file to a folder on my dektop so I can just replace them when it happens, but I move my computer twice a day for work and it's getting tiresome.

Chosen solution

Don't seem to have any issues anymore. Thank you for all the help y'all.

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When you close Firefox, it may be crashing instead of closing and this may not be obvious to you as the expected behaviour (Firefox closes) is exactly the same. Can you please provide the support information as per the below instructions?

To find the correct solution to your problem, we need some more non-personal information from you. Please do the following:

  1. Use ONE of these methods to open the Firefox Troubleshooting Information page:
    • Click the menu button fx57menu , click on Help Fx57Help and select Troubleshooting Information.
    • Type about:support into the Firefox address bar and press the enter key.
  2. At the top of the Troubleshooting Information page that comes up, you should see a button that says "Copy text to clipboard". Click it.
  3. Now, go back to your forum post, right-click in the reply box and select Paste from the context menu (or else click inside the reply box and press the Ctrl+V keys) to paste the information you copied into the forum post.
    • Due to a forum reply character limit, only part of the data may be pasted. You can use your mouse to select the missing text from the about:support page, right-click on the page to copy it and then right-click in the forum reply box to paste it into a new reply.

Note: The Troubleshooting Information page does not contain personal data, except for the full path to your profile folder. When you use one of the "Copy to clipboard" buttons, the profile path is not copied. Use other tools and methods at your own risk.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

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Application Basics

Name: Firefox Version: 67.0.2 Build ID: 20190607204818 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0 OS: Windows_NT 10.0 Launcher Process: Disabled forcibly Multiprocess Windows: 1/1 Enabled by default Web Content Processes: 9/8 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

All Crash Reports Firefox Features

Name: Firefox Monitor Version: 3.0 ID:

Name: Firefox Screenshots Version: 37.1.0 ID:

Name: Form Autofill Version: 1.0 ID:

Name: Web Compat Version: 4.0.0 ID:

Name: WebCompat Reporter Version: 1.1.0 ID:


Name: uBlock Origin Version: 1.19.6 Enabled: true ID:

Security Software

Type: AVG Antivirus

Type: AVG Antivirus



Features Compositing: Basic Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 0000000000011bc1) EGL_VERSION: 1.4 (ANGLE 2.1.0.eff6bfdb1db9) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_CHROMIUM_sync_control EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization EGL_ANGLE_create_context_extensions_enabled EGL_MOZ_create_context_provoking_vertex_dont_care EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses EGL_KHR_debug EGL_ANGLE_explicit_context WebGL 1 Driver Renderer: Google Inc. -- ANGLE (Microsoft Basic Render Driver Direct3D11 vs_5_0 ps_5_0) WebGL 1 Driver Version: OpenGL ES 2.0 (ANGLE 2.1.0.eff6bfdb1db9) WebGL 1 Driver Extensions: GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_explicit_context GL_ANGLE_explicit_context_gles1 GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_color_buffer_float_rgb GL_CHROMIUM_color_buffer_float_rgba GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_s3tc_srgb GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_KHR_parallel_shader_compile GL_KHR_robust_buffer_access_behavior GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_surfaceless_context GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object OES_compressed_EAC_R11_signed_texture OES_compressed_EAC_R11_unsigned_texture OES_compressed_EAC_RG11_signed_texture OES_compressed_EAC_RG11_unsigned_texture OES_compressed_ETC2_RGB8_texture OES_compressed_ETC2_RGBA8_texture OES_compressed_ETC2_punchthroughA_RGBA8_texture OES_compressed_ETC2_punchthroughA_sRGB8_alpha_texture OES_compressed_ETC2_sRGB8_alpha8_texture OES_compressed_ETC2_sRGB8_texture 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_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: - WebGL 2 Driver Renderer: WebGL creation failed: * Refused to create WebGL2 context because of blacklist entry: FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR WebGL 2 Driver Version: - WebGL 2 Driver Extensions: - WebGL 2 Extensions: - Direct2D: Blocked for your graphics card because of unresolved driver issues. Uses Tiling (Content): true Off Main Thread Painting Enabled: true Off Main Thread Painting Worker Count: 3 Target Frame Rate: 64 DirectWrite: true (10.0.16299.755) GPU #1 Active: Yes Description: Microsoft Basic Display Driver Vendor ID: 0x00ba Device ID: 0x00ba Driver Version: 10.0.16299.15 Driver Date: 6-21-2006 Drivers: Unknown Subsys ID: 000000ba RAM: Unknown

Diagnostics AzureCanvasBackend: skia AzureCanvasBackend (UI Process): skia AzureContentBackend: skia AzureContentBackend (UI Process): skia AzureFallbackCanvasBackend (UI Process): cairo GPUProcessPid: 8492 ClearType Parameters: Gamma: 1.8 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50 Decision Log D3D11_COMPOSITING: Blocklisted; failure code BLOCKLIST_FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR DIRECT2D: unavailable by default: Direct2D requires Direct3D 11 compositing D3D11_HW_ANGLE: unavailable by default: D3D11 compositing is disabled disabled by env: D3D11 compositing is disabled WEBRENDER: opt-in by default: WebRender is an opt-in feature unavailable by runtime: ANGLE is disabled WEBRENDER_QUALIFIED: blocked by env: No qualified hardware


Audio Backend: wasapi Max Channels: 2 Preferred Sample Rate: 48000 Output Devices Name: Group Speakers (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0295&SUBSYS_103C81FE&REV_1000\4&10f860b&0&0001 Bluetooth Handsfree Audio (BBH-930( Mono )): BTHENUM\{0000111e-0000-1000-8000-00805f9b34fb}_LOCALMFG&005d\8&1a9d2f01&0&06A200114485_C00000000 Headphones (BBH-930 Stereo): BTHENUM\{0000110b-0000-1000-8000-00805f9b34fb}_LOCALMFG&005d\8&1a9d2f01&0&06A200114485_C00000000 1 - Digital Display Audio (AMD High Definition Audio Device): HDAUDIO\FUNC_01&VEN_1002&DEV_AA01&SUBSYS_00AA0100&REV_1007\4&28319b6&0&0001 Input Devices Name: Group Internal AUX Jack (BBH-930( Mono )): BTHENUM\{0000111e-0000-1000-8000-00805f9b34fb}_LOCALMFG&005d\8&1a9d2f01&0&06A200114485_C00000000 Stereo Mix (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0295&SUBSYS_103C81FE&REV_1000\4&10f860b&0&0001 Microphone Array (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0295&SUBSYS_103C81FE&REV_1000\4&10f860b&0&0001 Internal AUX Jack (AMD High Definition Audio Device): HDAUDIO\FUNC_01&VEN_1002&DEV_AA01&SUBSYS_00AA0100&REV_1007\4&28319b6&0&0001

Important Modified Preferences

accessibility.blockautorefresh: true browser.cache.disk.capacity: 1048576 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.hashstats_reported: 1 browser.cache.disk.smart_size.first_run: false 2 browser.places.smartBookmarksVersion: 8 browser.sessionstore.upgradeBackup.latestBuildID: 20190607204818 browser.startup.homepage: browser.startup.homepage_override.buildID: 20190607204818 browser.startup.homepage_override.mstone: 67.0.2 browser.urlbar.matchBuckets: general:5,suggestion:Infinity browser.urlbar.placeholderName: Google browser.urlbar.suggest.history: false browser.urlbar.timesBeforeHidingSuggestionsHint: 0 dom.forms.autocomplete.formautofill: true dom.push.userAgentID: 72bddd3466604dfcbcec8b595f482f62 extensions.formautofill.addresses.enabled: false extensions.formautofill.firstTimeUse: false extensions.lastAppVersion: 67.0.2 font.internaluseonly.changed: true idle.lastDailyNotification: 1560432675 layers.mlgpu.sanity-test-failed: false media.benchmark.vp9.fps: 97 media.benchmark.vp9.versioncheck: 5 media.gmp-gmpopenh264.abi: x86_64-msvc-x64 media.gmp-gmpopenh264.lastUpdate: 1558763109 media.gmp-gmpopenh264.version: 1.8.1

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media.gmp-manager.buildID 20190607204818 media.gmp-manager.lastCheck 1560422976 media.gmp-widevinecdm.abi x86_64-msvc-x64 media.gmp-widevinecdm.lastUpdate 1558100997 media.gmp-widevinecdm.version 4.10.1146.0 1 media.hardware-video-decoding.failed false network.cookie.prefsMigrated true network.dns.disablePrefetch true network.http.max-persistent-connections-per-server 4 network.http.speculative-parallel-limit 0 network.predictor.cleaned-up true network.predictor.enabled false network.prefetch-next false places.database.lastMaintenance 1559941900 places.history.expiration.transient_current_max_pages 112348 plugin.disable_full_page_plugin_for_types application/pdf privacy.cpd.cache false privacy.cpd.cookies false privacy.cpd.formdata false privacy.cpd.sessions false privacy.popups.showBrowserMessage false privacy.sanitize.pending [{"id":"newtab-container","itemsToClear":[],"options":{}}] privacy.sanitize.timeSpan 0 security.disable_button.openCertManager false security.remote_settings.intermediates.checked 1560441993 security.sandbox.content.tempDirSuffix {e23fb4c8-b7f3-4a76-8920-35a26ad297f2} security.sandbox.plugin.tempDirSuffix {b1b11846-aabf-4916-baf7-d048215c3953} security.ssl.errorReporting.automatic true services.sync.declinedEngines bookmarks,addons,forms,history services.sync.engine.addons false services.sync.engine.addresses.available true services.sync.engine.bookmarks false services.sync.engine.history false services.sync.engine.prefs.modified false services.sync.lastPing 1560444026 services.sync.lastSync Fri Jun 14 2019 09:57:07 GMT+0300 (Arabian Standard Time) signon.importedFromSqlite true storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1558365979 ui.osk.debug.keyboardDisplayReason IKPOS: Touch screen not found. user.js Preferences

Your profile folder contains a user.js file, which includes preferences that were not created by Firefox. Important Locked Preferences Name Value security.enterprise_roots.enabled true Places Database Integrity JavaScript Incremental GC true Accessibility Activated false Prevent Accessibility 0 Accessible Handler Used true Accessibility Instantiator Library Versions Expected minimum version Version in use NSPR 4.21 4.21 NSS 3.43 3.43 NSSSMIME 3.43 3.43 NSSSSL 3.43 3.43 NSSUTIL 3.43 3.43 Sandbox Content Process Sandbox Level 5 Effective Content Process Sandbox Level 5 Internationalization & Localization Application Settings Requested Locales ["en-US"] Available Locales ["en-US"] App Locales ["en-US"] Regional Preferences ["en-US"] Default Locale "en-US" Operating System System Locales ["en-US"] Regional Preferences ["en-US"]

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Most likely it is caused by something AVG does at startup. Here's a recent article: Probably there will be more news on this by early next week as there are a lot of Avast and AVG users.

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Just had to reset the computer for driver updates and nothing happened to my passwords/logins. I'll update again after I leave work for the day if I do lose them again.

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AVG is aware of the problem by now and looking into a fix (should only be a matter of hours).

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Chosen Solution

Don't seem to have any issues anymore. Thank you for all the help y'all.