Fix: Handle PDF content in Firefox

Firefox does not allow extensions to run content scripts on PDF pages, so we have to work around this limitation. This commit adds a workaround that retrieves the PDF URL and type directly from the tab. This ensures that the extension can handle PDFs in Firefox while waiting for the bug in Firefox to be fixed.

src/libs/get-html.ts

@@ -42,14 +42,30 @@ export const getDataFromCurrentTab = async () => {
         .query({ active: true, currentWindow: true })
         .then(async (tabs) => {
           const tab = tabs[0]
+          try {
+            const data = await browser.scripting.executeScript({
+              target: { tabId: tab.id },
+              func: _getHtml
+            })
 
-          const data = await browser.scripting.executeScript({
-            target: { tabId: tab.id },
-            func: _getHtml
-          })
-
-          if (data.length > 0) {
-            resolve(data[0].result)
+            if (data.length > 0) {
+              resolve(data[0].result)
+            }
+          } catch (e) {
+            console.log("error", e)
+            // this is a weird method but it works
+            if (import.meta.env.BROWSER === "firefox") {
+              // all I need is to get the pdf url but somehow 
+              // firefox won't allow extensions to run content scripts on pdf https://bugzilla.mozilla.org/show_bug.cgi?id=1454760
+              // so I set up a weird method to fix this issue by asking tab to give the url 
+              // and then I can get the pdf url
+              const result = {
+                url: tab.url,
+                content: "",
+                type: "pdf"
+              }
+              resolve(result)
+            }
           }
         })
     }