New Google Spreadsheets retain the formatting of text pasted from another source, how can I disable this feature?

Question

Google

New Google Spreadsheets retain the formatting of text pasted from another source, how can I disable this feature?
For example:
there is a table with a blue background of cells, we copy information from VKontakte, for example, paste it into a blue cell and see that the cell has become white, the font and its size and color have migrated from the original source. How to disable this feature? To insert only information, without formatting.
Thank you!

Answer 1

Paste without formatting elements shift+ctrl+v

Answer 2

And most likely this is not Google Docs, but a browser.
Google Chrome inserts with default formatting, Firefox doesn't. Like so.

Answer 3

"Google Chrome inserts with default formatting, Firefox - without. It seems so." - this happens until you start Google Chrome and go to Google translator, for example, then yes, Firefox copies without formatting. After starting Chrome and entering certain pages, even Firefox starts copying with formatting