I solved this problem with a little research. You can use it by doing research on the internet. Now I can use the "Install Chrome Extensions" add-on in Opera as before.
windows 7 the first computer i ever got, i remember the 3d text that would pop up when i didn't touch the mouse. i had a used windows 7 but it was my moms i still have it thanks for bringing back a lot of good times 🙂
Don't use this extension for third party
Don't use this extension to stole user data
Don't use this extension for any malice virus in the future.
If the extension is used by a company name it like "X for companyâ„¢"
And etc.