In order to better allow people to try to understand your issue and help you solving it, here are some instructions on how to post about problems in Opera.

Start the topic with a title that briefly describe the problem so people will know about what this is about.
Don't try to explain all the problem in the title.

Use tags to make it easy for other users to find posts about similar issues. If posting about Opera Mail then add the 'Opera Mail' tag

In the post (body) you should include the following information:

• Version of Android

• Phone model and manufacturer

• Your version of Opera for Android

• If the problem is with a page, a link to it

• If ad-blocker is enabled or not

• If data savings is enabled or not

• A screen-shot of the problem if it's related to something not showing as should

• A description of the problem, including as much as information as possible

• Steps to (try to) reproduce the issue

• Expected behavior and actual one

• One suggestion or feature request per topic. Related ones can be grouped in the same topic

• Describe your suggestion or feature request clearly

• Say why it would be interesting to have it implemented. Imagine that you need to convince an investor that it's worth to spend time and money on your idea.

• You are allowed to "bump" a suggestion/request every six months

In order to better allow people to try to understand your issue and help you solving it, here are some instructions on how to post about problems in Opera for Android.

Before posting, some required (mandatory) steps

First of all you should check if the problem is not being caused by an extension or a broken profile. Do the following required steps, re-starting Opera after each one of them and checking if the problem remains after each one.

• Disable all extensions

• Disable the ad-blocker/tracker blocker

• Reset settings to default (Do a backup and export your passwords first)

• Reset flags to default

• Create a clean profile folder/directory

• Temporarily disable antivirus, firewall, anti-malware and all related software in your system

• If the problem is with a web page, check if it works with other browsers. Try checking with other Chromium based browsers

• Check if your Windows is up to date

Posting about your problem

After have done the steps above and confirmed that the problem is, most probably, in Opera, it's time to post about it.

Read the rules: https://forums.opera.com/rules

Start the topic with a title that briefly describe the problem so people will know about what this is about.
Don't try to explain all the problem in the title.
Try to be as more specific as possible. Avoid too generic topic titles.

Use tags to make it easy for other users to find posts about similar issues. If posting about Opera Mail then add the 'Opera Mail' tag
Try to use up to 3 tags.

In the post (body) you should include the following information:

• Your version of Windows

• Your version of Opera

• If the problem is with a page, a link to it

• A screen-shot of the problem if it's related to something not showing as should

• A description of the problem, including as much as information as possible

• Steps to (try to) reproduce the issue

• Expected behavior and actual one

Do not use caps on your post. There aren't and there never will be reasons to use caps.

• Use [Suggestion] or [Request] in the topic title

• Use the tags Suggestion and/or Request

• One suggestion or feature request per topic. Related ones can be grouped in the same topic

• Describe your suggestion or feature request clearly

• Say why it would be interesting to have it implemented. Imagine that you need to convince an investor that it's worth to spend time and money on your idea.

• You are allowed to "bump" a suggestion/request every six month

Seems to be working in LVL4 (core: 96.0.4693.59).

Edit: You need to enable opera://flags/#scrollable-tab-strip for it to work for now.

• One suggestion or feature request per topic. Related ones can be grouped in the same topic

• Say for which one of the Opera's mobile browsers your suggestion/request is

• Describe your suggestion or feature request clearly

• Say why it would be interesting to have it implemented. Imagine that you need to convince an investor that it's worth to spend time and money on your idea.

• You are allowed to "bump" a suggestion/request every six month

Before posting, some required steps

First of all you should check if the problem is not being caused by an extension or a broken profile. Do the following required steps, re-starting Opera after each one of them and checking if the problem remains after each one.

• Disable all extensions

• Disable the ad-blocker

• Reset settings to default (Do a backup and export your passwords first)

• Reset flags to default

• Create a clean profile folder/directory

• Temporarily disable antivirus, firewall, anti-malware and all related software in your system

• If the problem is with a web page, check if it works with other browsers.

@DellorMallot What are you talking about?

@raphaelareas Nope, you can't.

@raphaelareas Why you couldn't add it?

@nomadMik It used to work before?

If so, you can report it using the Report a problem tool.

@romboide Click on Aria icon on sidebar (make sure it's enabled in sidebar settings and in general settings) and start using it.

You can also use Aria through the command line, by pressing Ctrl /

@raimane Opera doesn't have such feature as far as I know.

@Ben-0001 What version of Opera GX? You can check in opera://about.

@indiqazzz As said, disable the option to autohide sidebar for now.

@Algedi80 Maybe a site issue?

@Hjeerau Opera One or Opera GX?

I don't see it here, maybe it depends on screen size?