@CP I something playing with this extension and made some changes. Result is in the attached file. Please give me your opinion.
Some remarks about extension:
1. Some phrases from 'adOverlay.js' file should be translated - made in the mine version
2. All explanations and links which are in the about window should be in the options window. End users not displayed about window and will don't see this useful explanations - made in the mine version
3. All operators are translated but are displayed only in the options window. Translated operators aren't displayed in the context menu for selected text - not made in the mine version
4. Inside many files is license - for what? In the main directory is file with license.
5. Links are opened in new window - should be opened in new tab - made in the mine version
Edit: I added Goofy's remark.