If Acrobat doesn't do this then it would be a FoxIt issue not related to FF.

SolarPete said

My colleagues use Foxit reader for PDFs but when PDF images are displayed on screen they have white lines across them. This doesn't happen on other browsers or if using Acrobat. Anyway we can get rid of this?

Hi, are you using Acrobat as a stand alone or are you using Firefox with Acrobat as default to open PDF's in Applications ? Are there any issues with what you see when you use Firefox as the default in Applications to open PDF's ? As was suggested if the answer is no then the issue probably is Foxit Reader Issue which you should follow up with their support or help pages : https://www.foxitsoftware.com/pdf-reader/

Please let us know if this solved your issue or if need further assistance.

See also:

• /questions/1210689 Firefox shows weird pdf

i have this problem in ff61.0.1 on some pdfs. this image should not have white lines.

Hi TonyP, Pkshadow's post was marked as the solution by the person who asked the original question (SolarPete). Your issue may have similar symptoms, but it is likely a different cause/solution. You should use https://support.mozilla.org/en-US/questions/new where volunteers can get more details about your setup.

Because this thread is solved and more people might start using it for their own questions, I'm going to lock it.