In Liberal Judaism, it is very much left up to the bereaved family to decide how they wish to hold the funeral and mourn afterwards.
Rabbis and congregational leaders will give guidance where it is required, and explain practices at the time, but no-one is compelled to carry out rituals which they do not want to perform.
For a number of Jews, the traditional rituals associated with mourning are a great comfort and support. There is often a familiarity when it comes to taking up the traditions practised by one’s parents and grandparents and these often bring consolation and reassurance.
For Liberal Jews, tradition has its place and importance, but its observances and rituals are not necessarily obligatory. We assume such rituals because they have meaning and purpose for us, because they are comforting and supportive, and ultimately, because they help us to come to terms with our loss.
Please contact Liberal Judaism, or your rabbi, for more details.