1. A method executed on a computing device for linking a web extension and content contextually, the method comprising: receiving a manifest formatted using extensible markup language (XML) from a cache, wherein the manifest includes the web extension and specifies a time period to activate the web extension; in response to a detection of the activation of the web extension, retrieving a regular expression rule of the web extension from the manifest and loading the regular expression rule into a memory of the computing device, wherein the web extension specifies entities in the regular expression rule and wherein the regular expression rule is a description of a pattern that matches an entity within the content; extracting the entities on a server associated with an application of the computing device, wherein the application hosts the web extension; evaluating the regular expression rule at run-time on the application; in response to a detection of a user action to display the content, detecting the content; processing the content with the web extension to match the regular expression rule of the web extension to the entities in the content; storing the entities in the memory of the computing device and linking the entities to the web extension contextually; displaying the content and the web extension that includes the entities that are contextually linked to the web extension; and emphasizing the entities within the content and the web extension by utilizing a highlighting scheme to highlight the entities, wherein the highlighting scheme emphasizes a contextual link between the entities and the web extension.
1. A method executed on a computing device for linking a web extension and content contextually, the method comprising: receiving a manifest formatted using extensible markup language (XML) from a cache, wherein the manifest includes the web extension and specifies a time period to activate the web extension; in response to a detection of the activation of the web extension, retrieving a regular expression rule of the web extension from the manifest and loading the regular expression rule into a memory of the computing device, wherein the web extension specifies entities in the regular expression rule and wherein the regular expression rule is a description of a pattern that matches an entity within the content; extracting the entities on a server associated with an application of the computing device, wherein the application hosts the web extension; evaluating the regular expression rule at run-time on the application; in response to a detection of a user action to display the content, detecting the content; processing the content with the web extension to match the regular expression rule of the web extension to the entities in the content; storing the entities in the memory of the computing device and linking the entities to the web extension contextually; displaying the content and the web extension that includes the entities that are contextually linked to the web extension; and emphasizing the entities within the content and the web extension by utilizing a highlighting scheme to highlight the entities, wherein the highlighting scheme emphasizes a contextual link between the entities and the web extension. 5. The method of claim 1 , further comprising: in response to a detection that the entities match the regular expression rule, displaying a web extension control to emphasize the entities and the regular expression rule, wherein the web extension control is configured to interact with a user to emphasis the entities that match the regular expression rule; and detecting an activation of the web extension control.