If you don't want to install Google Chrome you can follow these steps:

Go here: https://gist.github.com/ruario/3c873d43eb20553d5014bd4d29fe37f1
Download the script then run. It will automatically download libwidevinecdm.so to opt/google/chrome/libwidevinecdm.so.

In Opera 64 on Ubuntu 18.04, that directory defined inside /usr/lib/x86_64-linux-gnu/opera/resources/widevine_config.json. It might change in future versions, so keep in mind.

I just tested on Spotify Web Player, which works perfect.

According to Vivaldi developers there needs to be a manifest.json file for Chromium 79+. I tried to use that manifest file for Opera but I couldn't make it work.

If you want to try yourself here that file: (Make sure you have right version of Widevine)

{
    "arch": "x64",
    "description": "Widevine Content Decryption Module",
    "manifest_version": 2,
    "name": "WidevineCdm",
    "os": "linux",
    "version": "4.10.1582.1",
    "x-cdm-codecs": "vp8,vp9.0,avc1,av01",
    "x-cdm-host-versions": "10",
    "x-cdm-interface-versions": "10",
    "x-cdm-module-versions": "4",
    "x-cdm-persistent-license-support": false
}

Same problem. Doesn't matter if you are on main page or person's page. Clicking story always redirects to person's instagram page.

I deleted all cookies and logged in again but not working for some reason. (I am not using sidebar extension)

I used to press that button literally every day and after updating my Opera, i had a little shock for a while.

I always close tabs and need to reopen from last closeds literally every day. I have more than 150+ tabs because of my job currently, still I accidentally discovered "Search in Tabs" feature using shortcut (probably was Shift+Tab but it seems removed) but never used.

That button was one of best features of Opera when I start using it in 2009 and I still love it.

I hope developers find another way to implement new features without making old boys sad.

@l33t4opera Yes I learned what you mentioned. Also there is one more method I guess: right click on one of tab and click "Save all tabs as Speed Dial folder". If sync is open, I think these are saved to cloud too.

@macfly1987 I read it from a Vivaldi developer in Vivaldi forum, he said there needs to be a manifest file but I have no what to do.

I have already using with that option.

Problem is if you opened 2 windows and accidentally closed window with your tabs first, then empty window; you cannot restore your tabs again.

I am using Opera on Linux.

I was trying to fix Widevine so I run Opera from console. Then I opened a new window again. While I have 2 windows, I closed my main Opera window (with tabs) from console (Ctrl-C), then closed empty window.

When I open Opera, it comes with speed dial only. Is there a way to restore my old session?

History is still there but nothing in "Recently Closed" button.

According to Vivaldi developers there needs to be a manifest.json file for Chromium 79+. I tried to use that manifest file for Opera but I couldn't make it work.

If you want to try yourself here that file: (Make sure you have right version of Widevine)

{
    "arch": "x64",
    "description": "Widevine Content Decryption Module",
    "manifest_version": 2,
    "name": "WidevineCdm",
    "os": "linux",
    "version": "4.10.1582.1",
    "x-cdm-codecs": "vp8,vp9.0,avc1,av01",
    "x-cdm-host-versions": "10",
    "x-cdm-interface-versions": "10",
    "x-cdm-module-versions": "4",
    "x-cdm-persistent-license-support": false
}

Great. It is broken after Opera 66 update. Chrome version is 79 right now. I have no problem with Youtube videos but I cannot access Spotify.

I learned last version from this link: https://dl.google.com/widevine-cdm/versions.txt
Then downloaded last Widewine library using this link: https://dl.google.com/widevine-cdm/4.10.1582.2-linux-x64.zip
(This is what afore-mentioned script does)

All settings are correct but Opera doesn't play DRM content. I have updated this file too: /opt/google/chrome/libwidevinecdm.so

# /usr/lib/x86_64-linux-gnu/opera/resources/widevine_config.json
[
   {
      "preload" : "/opt/google/chrome/libwidevinecdm.so"
   },
   {
      "preload" : "/opt/google/chrome-beta/libwidevinecdm.so"
   },
   {
      "preload" : "/opt/google/chrome-unstable/libwidevinecdm.so"
   }
]

If you don't want to install Google Chrome you can follow these steps:

Go here: https://gist.github.com/ruario/3c873d43eb20553d5014bd4d29fe37f1
Download the script then run. It will automatically download libwidevinecdm.so to opt/google/chrome/libwidevinecdm.so.

In Opera 64 on Ubuntu 18.04, that directory defined inside /usr/lib/x86_64-linux-gnu/opera/resources/widevine_config.json. It might change in future versions, so keep in mind.

I just tested on Spotify Web Player, which works perfect.

Btw installing below fixed my problem without doing anything else. I couldn't find this when I searched first time.

https://launchpad.net/ubuntu/xenial/amd64/chromium-codecs-ffmpeg-extra/73.0.3683.75-0ubuntu0.16.04.1