Firefox freezes while sending or copying link to somewhere

When i am trying to copy the link or share the webpage to somewhere in my android(samsung). It got stuck not like working, but it did not copy or open then sharing window instantly it takes time to open the sharing window or link to copy, it have to send firefox to background and when I came to it then it do my work, so it is so messy so I have to go for other browser most of the time.