The ministry would first test-run Linux on its PCs and if no security issues arise, Linux systems will be introduced more widely within the government.
Ads would be displayed on the "Discover" section of the homepage and will also be placed with up to eight pictures in its search results as part of its "Gallery ads" feature
The activist, who had been arrested several times towards the end of last year, fled to Malaysia as she felt unsafe after taking part in a symbolic act against the monarchy.
Apart from presidential candidate Senator Kamala Harris, another Democratic candidate, Senator Elizabeth Warren had also stressed upon the possibility of breaking up Facebook.
Williamson's remark on Saturday comes as May is hoping to reach a cross-party consensus on her withdrawal agreement after failing to get it through Parliament three times.
After setting out from Havana's Paseo del Prado, one of the city's main boulevards, the marchers came up against a large number of police and state security forces.