"Could not unzip extension" error in all four browsers


My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
The strange thing is that Firefox no longer has the fault, after I reinstalled it

Reinstalled Ant Downloader or the extension?
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.
In Chrome, apparently;

In Chrome, navigate to chrome://extensions/
Now drag and drop the extension from your file manager anywhere onto the extensions page in Chrome.
If the extension is a . crx file you will be asked to review the permissions and add the extension.

You can also apparently load an unpacked extension in Chrome by entering Developer mode in extensions;

  1. Navigate to the Extensions page: Open Chrome and go to chrome://extensions.
  2. Enable Developer Mode: Look for a toggle switch labeled "Developer mode" and enable it. This will reveal additional options.
  3. Load Unpacked Extension: Click the "Load unpacked" button.
  4. Select the Extension Folder: Browse your file system and navigate to the folder containing the extension's files.
  5. Confirm and Install: Select the folder and confirm the installation.
  6. Select “Keep It”
 
Last edited:

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.

My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
In Chrome, apparently;

In Chrome, navigate to chrome://extensions/
Now drag and drop the extension from your file manager anywhere onto the extensions page in Chrome.
If the extension is a . crx file you will be asked to review the permissions and add the extension.

You can also apparently load an unpacked extension in Chrome, by entering Developer mode in extensions;

  1. Navigate to the Extensions page: Open Chrome and go to chrome://extensions.
  2. Enable Developer Mode: Look for a toggle switch labeled "Developer mode" and enable it. This will reveal additional options.
  3. Load Unpacked Extension: Click the "Load unpacked" button.
  4. Select the Extension Folder: Browse your file system and navigate to the folder containing the extension's files.
  5. Confirm and Install: Select the folder and confirm the installation.
  6. Select “Keep It”
antpants, I have already tried both of these procedures, in my opening post... Just seems strange that Firefox is now functioning as it should after a fresh install, but Chrome continues to not want to play
 

My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
antpants, I have already tried both of these procedures, in my opening post

Sorry about that, I lost track. I’m always looking into at minimum 5 threads at a time, my bad.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.
Sorry about that, I lost track. I’m always looking into at minimum 5 threads at a time, my bad.
No problem, to be honest, I had to go back and check to see if I had covered those tasks...
 

My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
Might be time to resort to using Internet Download Manager (IDM) I bought a license, never once had an issue, in who knows how many years.
They have a free 30 day trial.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.
First, is FFox still installing extensions after finding Chrome would not work?

If FFox is still working, try this uninstall to remove Chrome completely:

1. Go to Settings, Apps, Installed Apps, scroll down to find Chrome, ... Uninstall.
2. Go to this location: C:\Users\YOUNAME\AppData\Local\Google\
3. Go to this location: C:\Program Files (x86)\Google\ and delete any Chrome folder you find
4. Also check c:\Program Files\Google\ and delete any Chrome folder you find

Reboot, Reinstall Chrome, try again.
 

My Computer

System One

  • OS
    Windows 11 Pro 24H2
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel Ultra 7 155H
    Memory
    16gb
    Graphics Card(s)
    Intel Arc integrated
    Hard Drives
    SSD
First, is FFox still installing extensions after finding Chrome would not work?

If FFox is still working, try this uninstall to remove Chrome completely:

1. Go to Settings, Apps, Installed Apps, scroll down to find Chrome, ... Uninstall.
2. Go to this location: C:\Users\YOUNAME\AppData\Local\Google\
3. Go to this location: C:\Program Files (x86)\Google\ and delete any Chrome folder you find
4. Also check c:\Program Files\Google\ and delete any Chrome folder you find

Reboot, Reinstall Chrome, try again.
As per my recent post... Totally removed Chrome, even removing registry keys, then reinstalled, same results... Here is what I have been trying tonight. As FF is non non-Chromium backend, I tried downloading Opera, same results, Vivaldi, same results. If it is a security issue, why is FF getting through and the others aren't?
 

My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
As per my recent post... Totally removed Chrome, even removing registry keys, then reinstalled, same results... Here is what I have been trying tonight. As FF is non non-Chromium backend, I tried downloading Opera, same results, Vivaldi, same results. If it is a security issue, why is FF getting through and the others aren't?

Seems like a Chromium engine issue then. But if it was built in, I'd think a lot more people would be experiencing it. There are very few reports of the issue I could find and they were not really the same as yours.

You can't really remove Chromium's core since Edge uses it. But I have no idea if it actually shares code with other Chromium installations. But maybe doing a Repair on Edge would correct something. Couldn't hurt, I suppose, beyond losing some Edge settings.
 

My Computer

System One

  • OS
    Windows 11 Pro 24H2
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel Ultra 7 155H
    Memory
    16gb
    Graphics Card(s)
    Intel Arc integrated
    Hard Drives
    SSD
Problem now solved, and it was all down to a piece of software I don't remember installing... The culprit software was "GiMeSpace RAMFolder" After I removed the software, I was able to load all extensions.

Thank you to everyone who tried to help me resolve the problem.
 

My Computer

System One

  • OS
    Windows 11 Pro X64 Version 25H2 Build 26200.8328
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP
    CPU
    Core i5-8500 3.00 GHz
    Memory
    16 GB
Problem now solved, and it was all down to a piece of software I don't remember installing... The culprit software was "GiMeSpace RAMFolder" After I removed the software, I was able to load all extensions.

Thank you to everyone who tried to help me resolve the problem.
I came a cross the same problems, yes that sh*t is totally cr*p... I m here to say thank you !
 

My Computer

System One

  • OS
    win 11
    Computer type
    Laptop
    Manufacturer/Model
    Asus ROG

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