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)

Some web pages send a signal that turns off the copy / paste commands. Go to the Mozilla Add-ons Web Page. You want to check out an add-on called RightToClick

Cor-el...That worked perfectly. Now I just have to remember the keyboard shortcuts.

FredMcD That didnt make a difference but thank you for trying.

Thanks to both of you. I appreciate it.

You're welcome

See also [/questions/936323#answer-393468]

Why doesn't this solution work any longer? https://developer.mozilla.org/en-US/docs/Midas/Security_preferences

Ever since FF 29 I can no longer copy and paste in text editors. The user.js file is still intact. That's great that the alternative is the keyboard shortcuts but I find my right click to be more productive.

Many site issues can be caused by corrupt cookies or cache.

Clear the Cache
Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

and

Remove Cookies
Firefox/Tools > Options > Privacy.
Under History, select Firefox will Use Custom Settings.
There is a button on the right side called Show Cookies.

If there is still a problem, Start Firefox in Safe Mode
While you are in safe mode; Firefox Options > Advanced > General.
Look for and turn off Use Hardware Acceleration.
Poke around safe web sites and see if there is still a problem. Then restart

Support for CAPS to allow web pages access to the clipboard via user.js via capability.policy prefs has been removed in Firefox 29, so this is no longer possible.

You can use add-ons like YesScript (blacklist) or NoScript (whitelist).

• https://addons.mozilla.org/firefox/addon/yesscript/
• https://addons.mozilla.org/firefox/addon/noscript/

• [/questions/1000843] Is the user.js:capability.policy gone for good?

Unfortunately yesscript and noscript do not work.

No, that seem to apply to other cases where CAPS are involved.

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)

FF29 is the worst thing to ever come out of an update. Someone needs to find and post a do-able fix. The people behind the update should be ashamed of themselves for removing all the workarounds everyone was using to maintain cut and paste. For anyone using Wordpress we are now condemned to taking our hand off the mouse to do the ridiculous Control V commands and similar. If FF is supposed to be democratic, why are there dictators overseeing updates. If I trust my firewall and am willing to take the risk, why do these autocratic FF overseers make it impossible for me to do that? It seems to me to be in opposition to what FF is supposed to be about. Very disappointed that this change will force me to switch to another browser to use Wordpress.