@leocg Yes, I did all the things like in the "https://forums.opera.com/topic/43601/instructions-on-posting-about-problems-in-opera-for-windows/2", but it still can not show pdf file correcttly.
My OS is windows 10 21H2 64 bit, the ver of opera is 87.0.4390.45.
The problerm web page link is "https://www.analog.com/media/en/technical-documentation/data-sheets/adl5580.pdf".
The screen-shot of the problerm is
BTW, when I drop a local pdf file to opera, it also can not show it's content correcttly.
But as I mentioned before, when I install the old ver 85.0.4341.18 of opera, it did well all about those pdf files.

@888larson It works, thanks.

@888larson It works, thanks.

@leocg I downloaded opera just from https://www.opera.com/computer/portable, and ran it without any changes. But I do not think that web address give me a portable version opera, maybe that is another bug of the website. Leocg, I think you can try to download from https://www.opera.com/computer/portable to tell that. If it was possible, will you please give me a directly URL to download the portable version opera. My OS is Win 10.

@leocg OK, I tried to download the version from https://www.opera.com/computer/portable, and the screen shot of the installation is just like this.

Are you sure this is the portable version? The Help->about opera menu screen shot is:

And it still fails to open the pdf file, the screen shot is:

@leocg I find a portable version of opera here "https://portableapps.com/apps/internet/opera_portable", and get the same problerm of pdf files.
The screen shot of pdf file:

The about page of opera:

@888larson I did not use VPN to visit the web, but directly. As you mentioned if the reason is due to the VPN, then all browsers should be affected, but the edge is OK as the attachment.
I have acrobat installed in my computer to read the pdf files, and it works fine.

@leocg Sorry, the download link in https://www.opera.com/computer/portable is not a portable version, it needs to install before running. I compared the download file, it is same as the version from https://download.opera.com/download/get/?partner=www&opsys=Windows&arch=x64.

@888larson Yes, edge can open the pdf correctly, and I tried different web site with pdf files, also with local computer pdf files, opera fails all.

@wuj said in opera can't open pdf in new version:

@leocg Yes, I did all the things like in the "https://forums.opera.com/topic/43601/instructions-on-posting-about-problems-in-opera-for-windows/2", but it still can not show pdf file correcttly.
My OS is windows 10 21H2 64 bit, the ver of opera is 87.0.4390.45.
The problerm web page link is "https://www.analog.com/media/en/technical-documentation/data-sheets/adl5580.pdf".
The screen-shot of the problerm is
BTW, when I drop a local pdf file to opera, it also can not show it's content correcttly.
But as I mentioned before, when I install the old ver 85.0.4341.18 of opera, it did well all about those pdf files.

I tried to install opera 87.0.4390.45 on a Win7 in a virtual machine, and it shows the same problerm. On the virtual machine the opera is the first time to be installed, so it should be a clean installtion.

@leocg Yes, I did all the things like in the "https://forums.opera.com/topic/43601/instructions-on-posting-about-problems-in-opera-for-windows/2", but it still can not show pdf file correcttly.
My OS is windows 10 21H2 64 bit, the ver of opera is 87.0.4390.45.
The problerm web page link is "https://www.analog.com/media/en/technical-documentation/data-sheets/adl5580.pdf".
The screen-shot of the problerm is
BTW, when I drop a local pdf file to opera, it also can not show it's content correcttly.
But as I mentioned before, when I install the old ver 85.0.4341.18 of opera, it did well all about those pdf files.

@leocg So what maybe the reason to cause the problerm? I tried to uninstall the new version of opera, and install the old version , it works fine. But when I reinstalled the newer version, the problerm comes back again. Also what I found is that the 85.0.4341.18 is the last version which works well for me, any newer version can not show pdf correcttly.

But today the old version opera insists to notice me to "Get the latest security update", and I can not stop it. If there are some methods to stop this warning, so I can use the old version continuely? I have deleted the file "opera_autoupdate.exe"