Please, make a proofread of the following text and correct the grammatical mistakes and solecisms.
I'd like to make a complaint, however I don't want to be insulting or ridiculous.
Dear Sir/Madam!
I'm using a Chromium based web browser, called Comodo Dragon, and the Google translator under it. I am very pleased with its quality and functionality, but unfortunately I am unable to use the reading aloud feature (listening the pronunciation). I am unsure if this malfunction has been caused by my browser or it is the deficiency of the software, so I would like to draw your attention to this problem, as you could check it over.
Best regards, Robert!
Thank you for your help!