It’s possible that there is a problem with the file(s) that store the extensions registry.

Type about:support in the address bar and press enter.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder

Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.

Delete all extensions* files and compatibility.ini in the Firefox profile folder to reset the extensions registry.

• https://support.mozilla.org/kb/Profiles

New files will be created when required.

After, restart Firefox.

See "Corrupt extension files":

• http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

• https://support.mozilla.org/kb/Unable+to+install+add-ons

+++++++++++++++++++++++++++ You will have to approve the updating one last time.

Did you try to click Restore Defaults in the Customize palette window?

• https://support.mozilla.org/en-US/kb/navigation-buttons-missing

I tried your method, still no difference

sorry new to forums, thought I responded to one person at a time! But I did try both cor-el and FredMcD suggestions and neither made a difference

Please list the add-ons that are having issues.

Also, Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Now in the Reply Box on the forum page, do a right-click in the box and select Paste.

This will show us your system details. No Personal Information Is Collected.

My list of add-ons are:

• U Block Origin
• Unpaywall
• Zotero Connector
• Grease Monkey

I have even tried installing random add ons that I wouldn't use from add.ons.mozillla.org just to test if its the specific ones I have and nothing will install.

Application Basics

Name: Firefox Version: 71.0 Build ID: 20191202093317 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0 OS: Windows_NT 10.0 Launcher Process: Enabled Multiprocess Windows: 1/1 Enabled by default Remote Processes: 9 Enterprise Policies: Inactive 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 Screenshots Version: 39.0.0 ID: [email protected]

Name: Form Autofill Version: 1.0 ID: [email protected]

Name: Web Compat Version: 6.4.0 ID: [email protected]

Name: WebCompat Reporter Version: 1.1.0 ID: [email protected]

Remote Processes

Type: Web Content Count: 7 / 8

Type: Extension Count: 1

Type: GPU Count: 1

Extensions

Name: Amazon.co.uk Version: 1.1 Enabled: true ID: [email protected]

Name: Amazon.com Version: 1.1 Enabled: true ID: [email protected]

Name: Bing Version: 1.0 Enabled: true ID: [email protected]

Name: DuckDuckGo Version: 1.0 Enabled: true ID: [email protected]

Name: eBay Version: 1.0 Enabled: true ID: [email protected]

Name: Google Version: 1.0 Enabled: true ID: [email protected]

Name: Greasemonkey Version: 4.9 Enabled: true ID: {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

Name: Twitter Version: 1.0 Enabled: true ID: [email protected]

Name: uBlock Origin Version: 1.24.2 Enabled: true ID: [email protected]

Name: Unpaywall Version: 3.90 Enabled: true ID: {f209234a-76f0-4735-9920-eb62507a54cd}

Name: Wikipedia (en) Version: 1.0 Enabled: true ID: [email protected]

Name: Zotero Connector Version: 5.0.60 Enabled: true ID: [email protected]

Security Software

Type: Windows Defender Antivirus

Type:

Type: Windows Firewall

Graphics

Features Compositing: Direct3D 11 (Advanced Layers) Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; autoscroll enabled WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. 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(adapter LUID: 0000000000009e22) EGL_VERSION: 1.4 (ANGLE 2.1.0.21dccd386996) 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_ANDROID_blob_cache EGL_ANDROID_recordable 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 2 Driver Renderer: Google Inc. -- ANGLE (AMD Radeon(TM) RX Vega 10 Graphics Direct3D11 vs_5_0 ps_5_0) WebGL 2 Driver Version: OpenGL ES 3.0 (ANGLE 2.1.0.21dccd386996) WebGL 2 Driver Extensions: GL_ANGLE_client_arrays GL_ANGLE_copy_texture_3d 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_memory_size GL_ANGLE_multi_draw GL_ANGLE_multiview_multisample GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control GL_ANGLE_provoking_vertex GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3

GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_multisample 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_func_extended GL_EXT_blend_minmax GL_EXT_color_buffer_float 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_float_blend GL_EXT_frag_depth GL_EXT_instanced_arrays 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_bptc GL_EXT_texture_compression_dxt1 G

J1723 said

Extensions

---

Name: Amazon.co.uk Version: 1.1 Enabled: true ID: [email protected]

Name: Amazon.com Version: 1.1 Enabled: true ID: [email protected]

Having more than one version of a program may cause issues.

Many have reported issues using the 64bit Firefox. Install the 32bit version from; Download Firefox For All languages And Systems {web link}

I don't know what happened but its working now. Thank you anyway :)

Good to hear. Safe surfing.