Showing pdf on browser

I need a way to show a pdf file on browser in codeignter v4.4.0 or later. I have tried inline method in download response but it always downloads the pdf file.

$this->response->download(.......)->inline();

even setting headers have not helped

return $this->response
            ->setHeader('Pragma','public')
            ->setHeader('Expires','0')
            ->setHeader('Cache-Control','must-revalidate, post-check=0, pre-check=0')
            ->setHeader('Content-Disposition','inline; filename="'.$filename.'"')
            ->setContentType('application/pdf')
            ->setHeader('Content-Length',strlen($data))
            ->download($filename,$data,true);

Would you please help me?

How to open a PDF files in web browser using PHP?

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

This worked.

return $this->response->download(WRITEPATH . 'patterna.pdf', null)
    ->setContentType('application/pdf')
    ->inline()
    ;

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

This worked.

return $this->response->download(WRITEPATH . 'patterna.pdf', null)
    ->setContentType('application/pdf')
    ->inline()
    ;

Thank you kenjis. It works great.
Of course I should disable "Internet Download Manager program" so the pdf be shown on the browser. In v3.4.8 and older the pdf file was shown without disabling that program when I set the headers.