Support saving selected content from iframes

[unikitty37]

Describe the bug
When trying to save a medium.com page that has been proxied through 12ft.io in order to make it readable, the … badge appears on the icon when trying to save the page, but no status is shown at the bottom left and the page is never saved.

To Reproduce
Steps to reproduce the behaviour:

1. Go to https://12ft.io/proxy?q=https://benmukebo.medium.com/session-cookies-vs-a-devise-jwt-for-authenticating-users-in-ruby-on-rails-fd923a0586a0
2. Select some part of the article (I selected the body of the article, without "about the author" footer)
3. Right-click the SingleFile icon and choose Save Selection

Expected behaviour
The status indicator appears at the bottom left of the page, then the page is saved to the configured destination.

Screenshots

Environment

• OS: macOS 13.6.1 (22G313)
• Browser: Vivaldi
• Version: 6.5.3206.59 (Stable channel) (arm64)

Additional context
I was unable to visit the page directly without using 12ft.io as it only shows the first couple of paragraphs, and demands I fork over personal data in order to read the rest. That is not going to happen under any circumstances, so I need SingleFile to work with the proxied page in order to save the content.

(To anyone reading this who publishes content on medium.com, please consider publishing on the open web instead!)

[gildas-lormeau]

Thank you for the detailed report. In fact the page is displayed in an iframe and today SingleFile does not support saving selected content in an iframe. That's the technical reason why it doesn't work.

It is possible in Firefox to workaround this problem easily by selecting "This Frame > Show only this frame" in the context menu before saving the selection. Unfortunately, Chromium doesn't offer this option via the context menu. You have to find the frame URL with the Dev Tools, for example, and open the URL (e.g. https://12ft.io/api/proxy?q=https%3A%2F%2Fbenmukebo.medium.com%2Fsession-cookies-vs-a-devise-jwt-for-authenticating-users-in-ruby-on-rails-fd923a0586a0) in a new tab.