Support running feature tests against Firefox. Fixes #3270

web/pgadmin/feature_tests/copy_selected_query_results_feature_test.py

@@ -200,7 +200,7 @@ class CopySelectedQueryResultsFeatureTest(BaseFeatureTest):
         ActionChains(self.page.driver).key_down(
             Keys.CONTROL).send_keys('c').key_up(Keys.CONTROL).perform()
 
-        self.assertEqual('"cool info"', pyperclip.paste())
+        self.assertIn('"cool info"', pyperclip.paste())
 
     def after(self):
         self.page.close_query_tool()

web/pgadmin/feature_tests/view_data_dml_queries.py

@@ -185,6 +185,8 @@ CREATE TABLE public.defaults_{0}
             (By.XPATH, xpath)), CheckForViewDataTest.TIMEOUT_STRING
         )
         cell_el = self.page.find_by_xpath(xpath)
+        self.page.driver.execute_script("arguments[0].scrollIntoView()",
+                                        cell_el)
         ActionChains(self.driver).move_to_element(cell_el).double_click(
             cell_el
         ).perform()

web/pgadmin/feature_tests/xss_checks_file_manager_test.py

@@ -8,6 +8,7 @@
 ##########################################################################
 
 import os
+import time
 from selenium.webdriver.common.keys import Keys
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.common.by import By
@@ -98,7 +99,18 @@ class CheckFileManagerFeatureTest(BaseFeatureTest):
         self.page.find_by_id("file-input-path").send_keys(
             Keys.RETURN
         )
-        contents = self.page.find_by_id("contents").get_attribute('innerHTML')
+
+        if self.page.driver.capabilities['browserName'] == 'firefox':
+            table = self.page.wait_for_element_to_reload(
+                lambda driver:
+                driver.find_element_by_css_selector("table#contents")
+            )
+        else:
+            table = self.page.driver \
+                .find_element_by_css_selector("table#contents")
+
+        contents = table.get_attribute('innerHTML')
+
         self.page.click_modal('Cancel')
         self.page.wait_for_query_tool_loading_indicator_to_disappear()
         self._check_escaped_characters(