This study focuses on testing the hypothesis that application of ICT at firm level and trade facilitation policies has a causal impact on the quality and quantity of manufactured exports, productivity and investment. The study findings based on production function estimates show a strong positive correlation between unobserved time invariant firm characteristics with the level of application of ICT, exports and productivity performance. Following the estimates based on GMM, when we control for firm fixed effects, the results suggest a strong positive correlation between unobserved firm fixed effects and both ICT and trade facilitation. Further findings of the study are that trade facilitation policies measured by government policies on prices, facilities on access to imported raw materials, preferential trade access and overall trade policy changes have significant influences on firm level performance of exports and productivity. Therefore, the potential missing links for the workability of trade facilitation and productivity are access to credit, skilled labour, demand deficiency and trade policy certainty. To halt stagnation of Tanzanian manufacturing exports and growth, via trade facilitation such as firm level factors, must be addressed.