Jailed Kremlin critic Alexei Navalny on Thursday called on Western tech giants to open an “information front” through advertising campaigns aimed at reaching Russians. “I urge the President of the United States, Boris Johnson, the European Commission, Ursula von der Leyen, Mark Zuckerberg… to urgently find a solution to crush Putin’s propaganda using publicity opportunities on social media,” he wrote on Twitter. “We need publicity. Lots of publicity,” he added. Criticising recent polls showing that support for Russia’s President Vladimir Putin had recently increased, he said he believed that w…