User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:59.0) Gecko/20100101 Firefox/59.0 Build ID: 20180310025718 Steps to reproduce: On my Mac (macOS 10.13.3) tried to copy an image from web page to clipboard via right-click on image, then "Copy Image". Switched to Thunderbird "Compose" window (as HTML email!), then "Paste." Actual results: Image was not copied as an inline image, but instead the URL was copied (although the image was visible in "Compose" window). When I saved as draft, I could confirm in "Source View" that just the URL was embedded, not the image. Expected results: The image should have been copied as an inline image. (When I did the same procedure as described above with Chrome, exactly THAT happened!)

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0 I have tested this issue on Mac 10.13 with the latest Firefox release (59.0.1) and the latest Nightly (61.0a1-20180320100122) and haven't managed to reproduce the issue. After navigating to a webpage and copying an image to clipboard using the "Copy Image" context-menu option via right-click, when switching to another application and using the "Paste" command or "Cmd+V" the image is correctly pasted. Could you please retest this using the latest Nightly build and report back the results? (You can download the latest Nightly build from here https://goo.gl/57dpxn) When doing this, please use a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/AR5o9d).

Considering the fact that I cannot reproduce this and the fact that the reporter did not answered to my request until now, I will mark this as Resolved-Incomplete. If anyone can still reproduce it, feel free to reopen the issue and provide more information.

(In reply to Emil Pasca [:emilpasca], Desktop Engineering QA from comment #1) > After navigating to a webpage and copying an image to clipboard using the > "Copy Image" context-menu option via right-click, when switching to another > application and using the "Paste" command or "Cmd+V" the image is correctly > pasted. It is not about "another application," but about Thunderbird. Can you please try it with that app?

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:59.0) Gecko/20100101 Firefox/59.0 I have tested this issue on Mac Os 10.13 with Thunderbird (52.5.0), the latest Firefox release (59.0.2) and the latest Nightly (61.0a1-20180419224145) and haven't managed to reproduce it. After navigating to a webpage, copying an image and then switching to Thunderbird and pasting the image into an email, the image is successfully pasted. *Also I have saved the images as "drafts" and send them and after checking the drafts and the sent emails, the images were displayed, but only after checking the "Show remote content in this message" option from "Preferences" was selected. Please see the attached screen-recording and let me know if I might have omitted any step: https://tinyurl.com/ycjoywte Can you please re-test this issue as mentioned in comment 1?

Considering the fact that I cannot reproduce this and the fact that the reporter did not answered to my request until now, I will mark this as Resolved-Incomplete. If anyone can still reproduce it, feel free to reopen the issue and provide more information.

Sorry for the delay in responding! (In reply to Emil Pasca [:emilpasca], Desktop Engineering QA from comment #4) > *Also I have saved the images as "drafts" and send them and after checking > the drafts and the sent emails, the images were displayed, but only after > checking the "Show remote content in this message" option from "Preferences" > was selected. I think you're not getting the point. The fact that you had to enable "Show remote content in this message" seems to be evidence that you have exactly the problem I'm describing: Not the image itself (the binary bitmap object) is embedded into the body of the message, but only the URL to the image. This is not what I want. I didn't select a menu option of "Copy Image address" or "Copy Image URL", but "Copy Image." Can you please confirm?

Hi Ralf, I can confirm the issue you are describing, I'm going to assign a component to this issue in order to involve the development team and get an opinion on this.