There's nothing in Firefox that prevents you from copying and pasting things with the context menu or keyboard shortcuts.

If you're having problems with a online editor website, make sure dom.event.clipboardevents.enabled is set to true in about:config.

RightToClick is only useful if you've encountered a website that prevents the context menu from showing, or replaces it with a custom menu that isn't useful. Even without that add-on, you can always hold down the Shift key when you right-click to show Firefox's context menu instead of the website's.

If the problems persist, first check if the issue goes away when starting Firefox with Add-ons Disabled. If that doesn't help, post an example link that's giving you trouble.

• Diagnose Firefox issues using Troubleshoot Mode

We have checked the setting referenced in your reply (dom.event.clipboardevents.enabled) to no avail. We get the following message when trying to copy/paste within this particular web-based application (Oracle's RPAS tool); however have verified the recommended setting and it still does not work. That message was: You need set signed.applets.codebase_principal_support=true in about:config.

I'm starting to think it's a compatibility issue between Oracle's copy/paste functionality and FireFox.

Use keyboard shortcuts if the buttons on the web page or other methods aren't working.

• Copy: Ctrl+C or Ctrl+Insert (Mac: Command + C)
• Paste: Ctrl+V or Shift+Insert (Mac: Command + V)
• Cut: Ctrl+X or Shift+Delete (Mac: Command + X)

See also:

• http://kb.mozillazine.org/Clipboard_not_working

Already tried short cut keys...no method works. Even created a user.js file to attempt to modify settings to no avail. Perhaps it's more of a compatibility issue with the new version of Oracle's software and not so much FireFox.

I can't say what's going on the page without a link to it, but I'd guess the site is requesting privileges that are no longer being granted. You can probably get more information if you press Ctrl+Shift+K to open the web console, click the Clear button, then attempt to perform the actions that fail to work.

• [WONTFIX] Bug 789327 - Copy to clipboard failed - about:config preference signed.applets.codebase_principal_support also failed.
• Bug 546848, comment 57 - Remove support for enablePrivilege

Websites no longer can enable this privilege, but doing this manually by setting prefs via the user.js files should still work.

• [/questions/936323]#answer-393468

• http://kb.mozillazine.org/Granting_JavaScript_access_to_the_clipboard

So now we are able to copy/paste if we're copying data from within the browser into the browser...but if I wanted to copy values from an excel datasheet and then paste them into the browser, this appears to still be prevented. Our application does provide a "Paste from External" option; however it is more cumbersome than simply doing a Ctrl+V. I think we may have to live with it though.

Glad to hear that it's working!

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I had the same problem. Ctrl-C did not work in my Firefox because I had the add-on Translator installed, the one with the large red T. In the options box of T-translator I had a mark in the "Hotkey for the action chosen above" part in the box left of "Ctrl". I disabled that mark and after restart I was able to use Ctrl-C again within Firefox.