The latest Ifop poll found that up to 63 percent of French voters back gay marriage, against 60 percent in earlier January, while pro-adoption rate arrived at 49 percent.
After the Socialist government approved the bill to allow same-sex couples to marry and adopt children in November 2012, religious leaders and conservatives mobilized against the move with France's leading Roman Catholic Church warning that the bill would destabilize the French society's equilibrium.
Until Friday night, more than 5,000 amendments to the bill had been tabled.