Is there a way to force dark theme for a single site? Maybe something like a "switch" at the end of a URL?

1. Most sites support Opera's Dark Theme seamlessly.
2. One of my regular sites doesn't support it unless I force dark theme.
3. Once I force dark theme, some sites that displayed dark theme OK before now are messed up.

I've read in an older thread (yes, they are sometimes helpful) that I can right-click on a page and see an option to enable or disable dark theme for that page. That seems to be the case only when force dark theme is enabled in settings.

@leocg Not quite - I have Excel files on my laptop, but would like to create a bookmark with a local link e.g. "file:///c:..."), but while I can use Opera with that format to drill down to the appropriate subfolder, when I click on a selected file it only prompts me to download it - not open it.

Maybe there's another extension or maybe a plugin available that I haven't found yet???

Is there a way to open Excel files from Opera on a Windows PC ?
I've tried the legacy "Documents" extension (latest revision was 2014!), but it doesn't seem to work in current Opera versions.

Never mind - I just found it. It's the "Privacy Protection" button (the shield with a check mark inside it).

Is there a way to add a button or something to the Menu bar to easily add a current site that I'm visiting to Ad Blocking Exceptions? (Something like the "heart" symbol to add a current site to Bookmarks)

The new Opera One(version: 100.0.4815.31) is missing the beloved Speed Dial button on the previous defaulted top left area of the browser. How do I get it back so that it's presence is persistent and not just a one-timer set as a browser app start page?

Is there a way to create an exception and keep login-related cookies for specific sites when I clear "all" history/cookies/browsing data?

How do I view my synchronized devices from both Windows and Android?

Is there a URL syntax to go directly to a nested bookmark folder?
For instance, I want to go directly to "Watch List".
Bookmarks\Entertainment\CBS\Watch List

I have several websites that I visit on a regular basis. How do I retain only their information and delete the rest when I clear cache, cookies, history, etc. when I close the browser?

The problem is that after the data is cleared, many sites require re-authentication - sometimes a notable inconvenience.