Is this on some websites, many? What type of fields are you working on?

Have you tried using the mouse?

Hey there,

So those short cut combinations are to tab between tabs. And I doublechecked Win10 shortcuts here https://support.microsoft.com/en-us/h.../windows-keyboard-shortcuts

The old addon used to customize keyboard shortcuts is called Keybinder

FredMcD said

Is this on some websites, many? What type of fields are you working on? Have you tried using the mouse?

It is on all websites and not only on only readable texts but also in text boxes like this one I am using to write this comment. Mouse works. As I said, I can keep selecting by ctrl+shift+arrow right word by word after ctrl+shift+arrow down stops at the end of the first line.

tavtati said

FredMcD said

Is this on some websites, many? What type of fields are you working on? Have you tried using the mouse?

It is on all websites and not only on only readable texts but also in text boxes like this one I am using to write this comment. Mouse works. As I said, I can keep selecting by ctrl+shift+arrow right word by word after ctrl+shift+arrow down stops at the end of the first line.

I just discovered that this might not be about the key functions, but somehow proceeding lines are not perceived as the part of the whole text. Plus, when I try copy paste a line at the end of another line in a textbox, it adds it as a new paragraph. These two problems may be related. In short, there is a problem with line cutting.

It might be the coding of the page. Or part of what you want to copy is really a picture.

These might help;

https://addons.mozilla.org/en-US/firefox/addon/copy-as-plain-text/ Copy As Plain Text Removes formatting from copied text.

https://addons.mozilla.org/en-US/firefox/addon/link-toggler/ Link Toggler Want to copy a part of text but this text is a link? We'll help you! This addon toggles links on a web page. Simple run "Ctrl+Shift+L" (or Alt or Cmd instead of Ctrl, depends on your system settings) to toggle links on a page.

Anyway these are not solutions. I cant select multiple lines w that key combination in any website.

Hello,

Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:

• Click the menu button , click Help and select Restart with Add-ons Disabled.

If Firefox is not running, you can start Firefox in Safe Mode as follows:

• On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac: Hold the option key while starting Firefox.
• On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
  (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

When the Firefox Safe Mode window appears, select "Start in Safe Mode".

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help others with the same problem.